distinct species of that genus, named Sulphur-bottoms by the whalers. From the description given at page 90 of the British-Museum ‘Catalogue of Seals and Whales,’ there is no doubt that the baleen corresponds with the above species. The specimen was obtained at Kawau Island by Sir George Grey, and appears to be unique, as the species has hitherto only been known from the baleen. The dimensions are as follows:— lbs. Weight of cranium 58 Weight of lower jaw 13 ft. in. Length 4 9 Fronto-nasal section 2 10 To centre of orbit 3 10 Width at orbit 2 5 Width at mastoid process 2 7 in. lin. Lower jaw, high 3 11 Depth (greatest) 8 0 Baleen 29 inches long, 3½ inches in extreme width. Black margin from ¼ to ⅜ inch. “Knox now admits that this is not the Sulphur-bottom, which he says is the Trigger of the New-Zealand whalers. He fancies that _B. marginata_ may be the true Finner of the south. I will try to find some more of the bones.”—_Trans. New Zeal. Inst._ 1870, p. 26. This Whale, from the form and structure of the whalebone, cannot be a Finner, but is certainly, as I arranged it, a true Right Whale, very nearly allied to the Right Whale of Greenland, and of a very small size. The bones of this Whale would be a most valuable addition to the British Museum or any zoological museum. They appear not to be uncommon in the Kawau Islands; and the measurements of the skull are a valuable addition to our knowledge of the species. This small Right Whale of the Antarctic Sea is the representative of the Right Whale in the Arctic Sea, and, judging from the length of the head, cannot be more than 14 or 15 feet long, while the Greenland Whale is from 50 to 65 feet long. II. _Baleen thick, not polished, with a thin enamel coat on each side, and a coarse thick fringe_ (cf. p. 37). 3. EUBALÆNA. Eubalæna, _Gray_, _l. c._ p. 91; _Synops. Whales & Dolph._ p. 1; _Lilljeborg_, _N. Acta Upsal._ vi. 1867; _Flower_, _Trans. Zool. Soc._ vi. p. 115.