Inhab. Australian seas.

Atlas vertebra—the width, measuring from the extremity of the lower processes, 28½ inches; width of the atlas 25 inches; height from the base of atlas to top of crest 18 inches. Thickness of last cervical vertebra 10 inches.

2. Macleayius britannicus.

B.M.

Macleayius britannicus, Gray, Ann. & Mag. N. H. 1870, vi. pp. 198 & 204.

Balæna biscayensis, Van Beneden (part.), Ostéogr. Cét. tab. 7. fig. 7 (copied from Gray, Cat. Seals & Whales, p. 83, fig. 3).

Balæna britannica, Gray, Ann. & Mag. N. H. 1870, vi. p. 200.

Inhab. Lyme Regis, Dorsetshire.

Cervical vertebræ of Balæna from Lyme Regis (Gray, Cat. Seals & Whales, p. 83, f. 3) copied on plate of Balæna biscayensis, Ostéog. Cét. t. 7. f. 7. Dredged up at Lyme Regis. The lateral processes of this bone are much more like those of Macleayius australiensis than those of any other species; yet it differs in the outer edge of the broad lateral process being oblique, narrowed towards the base, and in the lower lateral process being shorter, turned up at the end, and the outer end obliquely truncated and subangular below. This massive vertebra has no affinity with B. biscayensis, and indicates the existence of a completely different new species of Right Whales, which appears to be an inhabitant of our seas.

Suborder II. BALÆNOPTEROIDEA (cf. p. 36).