Though the drawings in caves depict lizards, echidna, turtle and men, there is no representation of kangaroo or wallaby. It is highly probable that if such had been common, the black artists would have chosen them as subjects, since nearly all their studies are from Nature.
The largest and heaviest four-footed creature now existent on Dunk Island is the so-called porcupine (spiny ant-eater or echidna). An animal which possesses some of the features of the hedgehog of old England, and resembles in others that distinctly Australian paradox, the platypus, which has a mouth which it cannot open—a mere tube through which the tongue is thrust, which in the production of its young combines the hatching of an egg as of a bird, with the suckling of a mammal, and which also has some of the characteristics of a reptile, cannot fail to be an interesting object to every student of the marvels of Nature. When disturbed, the echidna resolves itself into a ball, tucking its long snout between its forelegs, and packing its barely perceptible tail close between the hind ones, presenting an array of menacing prickles whencesoever attacked. While in this ball-like posture, the animal, as chance affords, digs with its short strong legs and steel-like claws, tearing asunder roots, and casting aside stones, and the ease and rapidity with which it disappears in soft soil are astonishing. The horrific array of prickles presented as it digs an undignified retreat, and the tenacity with which it holds the ground, have given rise to the fiction that no dog is capable of killing an echidna. No ordinary dog is. He must be cunning, daring, brave, insensible to pain, and resourceful. Then the feat is quite ordinary. Indeed, once the trick is learned, the trouble is to keep the dog from attacking its innocent, useful and most retiring enemy. The echidna has the ill-luck to possess certain subtle qualities, which excite terrific enthusiasm for its destruction on the part of the dog. Either there is an hereditary feud between the dog and the echidna, which the former is bound in honour to push to the last extremity, or else the dog regards the prickly creature as a perpetual affront, or specially created to provide opportunities for displaying fanatic hatred and hostility. No dog of healthy instinct is able to pass an echidna without some sort of an attempt upon its life. The long tubular nose of the echidna is the vital spot. This is guarded with such shrewdness and determination as to be impregnable. But the dog which pursues the proper tactics, and is wily and patient, sooner or later-regardless of the alleged poisonous spur—seizes one of the hind legs, and the conflict quickly comes to an end.
By the blacks the echidna, which is known as "Coombee-yan," is placed on the very top of the list of those dainties which the crafty old men reserve for themselves under awe-inspiring penalties.
Next in size to the echidna is the white-tipped rat (UROMYS HIRSUTIS?), water-loving, nocturnal in its habits, fierce and destructive. A collateral circumstance revealed absolute proof of its existence, which had previously depended upon vague statements of the blacks. Cutting firewood in the forest one morning, I came across a carpet snake, 12 feet long, laid out and asleep in a series of easy curves, with the sun revealing unexpected beauty in the tints and in the patterns of the skin. Midway of its length was a tell-tale bulge, and before the axe shortened it by a head, I was convinced that here was a serpent that had waylaid and surprised or beguiled a fowl. Post-mortem examination, however, proved once more the unreliability of uncorroborated circumstantial evidence. The snake had done good and friendly service instead of ill, for it had swallowed a white-tailed rat—the only specimen that I have seen on the island.
Next comes the little frugivorous rat of russet brown, with a glint of gold on its fur tips. A delicate, graceful creature, nice in its habits, with a plaintive call like the cheep of a chicken; preferring ripe bananas and pine-apple, but consenting to nibble at other fruits, as well as grain. The mother carries her young crouched on her haunches, clinging to her fur apparently with teeth as well as claws, and she manages to scuttle along fairly fast, in spite of her encumbrances. The first that I saw bearing away her family to a place of refuge was deemed to be troubled with some hideous deformity aft, but inspection at close quarters showed how she had converted herself into a novel perambulator. I am told that no other rodent has been observed to carry its young in this fashion. Perhaps the habit has been acquired as a result of insular peculiarities, the animal, unconscious of the way of its kind on the mainland, having invented a style of its own, "ages ahead of the fashion."
Mr C. W. de Vis, M.A., of the Queensland Museum, who has considerately examined specimens of this rat, pronounces it to be extraordinary, in that it combines types of three genera—the teeth of the mus, the mammae of the mastacomys and the scales on the tail of the genus UROMYS. In the bestowal of a name he has favoured the latter genus. The animal has been introduced to the scientific world under the title UROMYS BANFIELDI, by Mr de Vis, who, referring to it as "eccentric," says, "The female first sent to us as an example of the species had no young with her, nor were her mammae much in evidence; consequently, the advent of a specimen caught in the act of carrying young was awaited with interest. Fortune at length favoured our correspondent with an opportunity of placing the correctness of his observation beyond question. (A mother with a pair of infants attached to the teats was chloroformed and sent to Brisbane). On arrival, the young were found detached. The conical corrugated nipples are, compared with the size of the animal, very long; one, especially, 20 mm. in length, calls to mind a marsupial teat."
By the examination of adult specimens the age at which the young disassociate themselves from the mother has been ascertained. Long after the time of life at which other species of rats are nibbling an independent way through the world, U. BANFIELDI clings resolutely to its parent, obtaining from her its sole sustenance. Not until the "infant" is nearly half the size of the mother does it begin to earn its living and trust to its own means of locomotion.
The presence of the echidna in three colours—black, grey, and straw—and two species of rats emphasises the absence of marsupials, unaccountable unless on the theory of extermination by the original inhabitants in the remote past.