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Show 142 DR. J. E. GRAY ON NEW-ZEALAND WHALES. [Jan. 21, The Right Whales may be formed into two very distinct groups:- I. Scapula about as broad as long, acromion process distinct. Tympanic bone rhombic; aperture sliyhtly contracted at the upper end, about two thirds the length of the bone. A. The first rib with a single head and slightly dilated and truncated at the sternal end. * The lateral lobes of the atlas broad, truncated. The four hinder cervical vertebrae without any inferior process. BALCENA. Acromion process elongate, broad at the end ; coracoid process broad. Ear-bone compressed on edge. (Ost. Cet. t. iv., v.) M A C L E A Y I U S . Acromion process small, acute at the end ; coracoid process none. Ear-bones thick. (Figs. 1-4,p.135-140.) ** The lateral lobes of the atlas broad and truncated. The fourth and fifth cervical vertebrae with rudimentary inferior processes, and the seventh without any. (Van Beneden, Ost. Cet. t. vii. f. 9, 11.) Baleena mediterranea, Gray, Suppl. Cat. Seals and Whales, p. 38 ; B. biscayensis (part.), Van Beneden, Ost. Cet. t. vi. f. 1 & 8-11. Hab. Mediterranean Sea. *** Lateral processes of the atlas broad, with the lower edge obliquely truncated. The three hinder cervical vertebrae without any lower processes. (Cat. Seals and Whales, p. 83, f. 3.) Halibalcena britannica. (Fig. 5, p. 141.) **** Lateral processes of the atlas subcylindrical, rounded at the end. The lower process of the second vertebra rounded, the third vertebra having a very rudimentary lower process, and the other without any. (Catal. Cet. i. ii., f. 19.) Eubalcena australis. B. First rib double-headed and dilated and notched at the end. (Gray, Cat. Seals and Whales, p. 99, f. 8.) Hunterius temminckii. II. Scapula elongate, longer than broad, only a ridge in the place of the acromion process. First rib much dilated and deeply notched at the sternal end. The lateral processes of the atlas moderate, strap-shaped. The lower processes of the second vertebra large, elongate, rounded at the end, of the third to the sixth small, cylindrical, rudimentary ; the seventh without inferior processes. (Osteogr. Cet. t. iii., except figs. 12, 13, & 14.) Caperea antipodarum, Gray, Catal. Seals and Whales, Suppl. p. 45. The cervical vertebrae of Neobaleena are unknown, as are those of several other Whales. The fauna of New Zealand, as regards marine Mammalia, is extending, and, I have no doubt, will be found to be much richer as it is more studied. For example, we have not yet had the " Sulphur-bottom " or the <« Trigger " of New-Zealand whalers; and there are other specie^ |