142 DR. J. E. GRAY ON NEW-ZEALAND WHALES. [Jail. 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 slightly 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 vertebra? without any inferior process. 

 Bal^ena. Acromion process elongate, broad at the end ; cora- 

 coid process broad. Ear-bone compressed on edge. (Ost. 

 Ce't. t. iv., v.) 

 Macleayius. Acromion process small, acute at the end ; cora- 

 coid process none. Ear-bones thick. (Figs. l-4,p.l35-140.) 



** 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.) Balana 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 subcyliudrical, 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 aus- 

 tralis. 



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. (Oste'ogr. Cet. t. iii., except figs. 12, 13, 

 & 14.) Caperea antipodarum, Gray, Catal. Seals and Whales, 

 Suppl. p. 45. 

 The cervical vertebrae of Neobalana are unknown, as are those 

 of several other Whales. 



The fauna of New Zealand, as regards marine Mammalia, is ex- 

 tending, 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 



