| 305. Anthochæra inauris, Gould | Vol. IV. Pl. 54. |
| 306. Anthochæra carunculata | Vol. IV. Pl. 55. |
| 307. Anthochæra mellivora | Vol. IV. Pl. 56. |
| 308. Anthochæra lunulata, Gould | Vol. IV. Pl. 57. |
These four birds might with propriety be separated into two genera, those with auricular appendages, A. inauris and A. carunculata, having many characters differing from those of A. mellivora and A. lunulata.
Genus Tropidorhynchus, Vig. & Horsf.
The law of representation in Australia is chiefly confined to the species inhabiting the eastern and western coasts, but with the members of this genus it takes the opposite direction, or north and south, for more singular and perfect representatives of each other cannot be found than are the T. corniculatus and T. citreogularis of the south-eastern parts of the country, the T. argenticeps and T. sordidus of the north-western. Extra Australian species inhabit New Guinea and the neighbouring countries.
| 309. Tropidorhynchus corniculatus | Vol. IV. Pl. 58. |
| 310. Tropidorhynchus argenticeps, Gould | Vol. IV. Pl. 59. |
| 311. Tropidorhynchus citreogularis, Gould | Vol. IV. Pl. 60. |
| 312. Tropidorhynchus sordidus. |
Inhabits the Cobourg Peninsula, and is precisely similar to T. citreogularis, but is smaller in all its admeasurements except in the bill, which is more developed.
Genus Acanthorhynchus, Gould.
Bill elongated, slender and acute, compressed on the sides; tomia incurved; culmen acute and elevated; nostrils basal, elongated, and covered with an operculum; wings moderate in size and semi-rotund; first and fifth primaries equal; the third and fourth nearly equal in length, and the longest; tail moderate in size and slightly forked; tarsi lengthened and strong; middle toe long and robust, external toe exceeding the inner one in length.
This genus, like many others of the family, may be regarded as strictly Australian: it comprises two, if not three, well-marked species, each of which is confined to a particular part of the country; the A. tenuirostris dwelling in the eastern, and the A. superciliosus in the western districts: both inhabit countries precisely in the same degree of latitude, and form beautiful representatives of each other. Van Diemen’s Land is the native habitat of the species I have named A. dubius, which, as will be seen, I had made synonymous with A. tenuirostris, but which I am now inclined to consider distinct, an opinion in which Mr. Blyth coincides.
| 313. Acanthorhynchus tenuirostris | Vol. IV. Pl. 61. |
| 314. Acanthorhynchus dubius, Gould. | |
| 315. Acanthorhynchus superciliosus, Gould | Vol. IV. Pl. 62. |