end. First finger short, cartilaginous : the second with six, the third 

 with five, the fourth with two, and the fifth with one bony joint. The 

 wrist bones all separated by broad cartilages. Shoulder-blade oblique, 

 truncated at the posterior angle. From Mower. 



Teeth conical, large to small. 



" This genus," says Dr. Gray, " is at once known from Lageno- 

 rhychus and Delphinus by the length, compression, and tapering form 

 of the beak of the skull." 



SiEffo FBONTATUS, 1 Cuvier. The Fronted Dolphin. 

 Synonyms Delphinus frontatus, Cuvier, Owen. 



Stenofrontatus, Gray, B. M. C. and Suppl. 

 Teeth f^ large, about two in an inch, often rather rugose. 

 Dr. Dickie describes the animal as having the skin rough, the back 

 greyish black, and the belly dirty white, and the female being 9 feet 

 long. 

 Inhab. Indian Ocean. 



STESO coMPBEssus, 2 Gray. The Narrow-beaked Dolphin. 



Teeth ^j large, about two in an inch. 



" Beak of the skull compressed, attenuated in front." 



Inhab. South Seas. 



STEKO BOSTBATUS, 3 Cuvier. The Beaked Dolphin. 

 Synonyms Delphinus rostratus, Cuvier, Eeg. Anim., p. 289. 

 DelpJiinus planiceps, Breda, 1829. 



DelpliinorhyncusBredanensis, Jardine, N. L., vol. vii., p. 252. 

 Steno-rostratus, Gray, Suppl. B. M. C., 1871, p. 65. 



Teeth fjirl or 1:1, rather large, about two in an inch. 

 Animal black above, rosy -white beneath, having the lower part of the 

 sides black-spotted. 

 Inhab. North Sea. 



STENO SINENSIS,* Osbeck. The Chinese "White Dolphin. 

 Synonyms Delphinus sinensis, Osbeck, Desmarest, Flower, Tran. Zool. 



Soc., vol. vii. p. 151. 

 Steno sinensis (Chinensis), Gray, Suppl. B. M. C., 1871, 



p. 65. 



Teeth 55:5, many much worn down, about three in an inch. 

 The animal is milkish white, with pinkish fins and black eyes, and in 

 length 7 feet 6 inches. 



Inhab. China harbour of Amoy, Canton, and Foochow Eivers. 



1 Fronted. 

 1 Compressed. 



3 Beaked. 



4 Sin a, China, adj. smentis. 



