1. Catodon macrocephalus.

B.M.

Catodon macrocephalus, Gray, l. c. pp. 196 (f. 54), 202, 387; Synops. Whales & Dolph. p. 4.

Physeter macrocephalus, Flower, Trans. Zool. Soc. vol. vi. p. 309, tab. 55 to 61, and woodcuts.

Inhab. Tropical seas, accidentally in the temperate ones.

Mr. Flower (Trans. Zool. Soc. vol. vi.) considers C. australis, Gray, l. c. p. 206, fig. 55, the same species; and certainly there does not appear to be any character in the skeleton to divide them.

Maury remarks:—“The Sperm-Whale, according to the result of this chart, appears never to double the Cape of Good Hope. It doubles Cape Horn. Since this fish delights in warm water, shall we not expect to find off Cape Horn an under-current of warm water heavier with its salt?”—Maury, Whale-Charts, p. 267.

How far the species indicated range beyond the habitats whence they were received is yet to be discovered and recorded. No doubt their range is influenced by many local circumstances (peculiarities in the currents, and disposition of the food) that are not easily observed or understood.

2. MEGANEURON.

Meganeuron, Gray, l. c. pp. 386, 387; Synops. Whales & Dolph. p. 4.