128 CETACEA. 



D. plumbeus, Cuv. R. A. i. 288 ; F. Cuv. Cetac. 151 ; Mam. Li- 



thog. t. 



D. a ventre roux, Voy. Pole Sud, t. 22. f. 2. t. 23. f. 3, 4. 

 Steno Malayanus, Gray, Zool. Ereb. $ Terror, 43. 



Inhab. Indian Ocean. 



ft. in. 



Length of animal, entire ... 5 11 



of pectoral 1 1 



Width of tail 1 II 



There is a skull of Dauphin a ventre roux from Molucca, in the 

 Paris Museum. The nose is very slender, attenuated. Palatal 

 bone and intermaxillaries distinctly seen below ; intermaxillaries 

 very convex, dense ; lower jaw very compressed in front ; palate 

 flat, rather convex on each side behind, very spongy. 



There is a skull in the Paris Museum marked D. plumbeus, Mala- 

 bar, Dussumier. It measures as follows : Length, 22 ; beak, 13 ; 

 teeth-line, 12 ; width at notch, 4 ; symphysis of the lower jaw, 5 

 inches; teeth, f^-fy, large; beak elongated, higher than wide, 

 compressed in front ; triangle extending rather before the teeth- 

 lines. In the Anatomical Museum of the Jardine des Plantes is 

 a skull of a foetal specimen of this species, from Malabar, which 

 is 12 inches long, with the beak 8^ inches long, and 2| wide at 

 the notch. The symphysis of the lower jaw is 2 inches long. 

 The bones are not united ; the upper teeth are 36 ; they are as 

 large as those of the adult skull, and all enclosed in a cartilage 

 and very close together. From this skull it is evident that these 

 animals are born with the full number of teeth, which only elon- 

 gate as they gradually develope. 



2. STENO FRONTATUS. The FRONTEEV DOLPHIN. 



Nose of skull about f of its entire length, three times as long 

 as its width at the notch, rather compressed, rounded in front ; 

 lower jaw subangular and bent up at the end, united about J of 

 its length; teeth fi-ft^ often rather rugose. 



Skin rough, back greyish black, belly dirty white. Female 9 

 feet long. Dr. Dickie. 



Delphinus frontatus, Cuv. Oss. Foss. v. t. 21. f. 7, 8. t. 22. f. 8; 



jR. A. i. 288 ; Gray, List Mam. B. M. 105. 

 D. Reinwardtii, SMegel, Abh. i. 21. t. 2. f. 3, 4. t. 4. f. 7- 

 Steno frontatus, Gray, Zool. Erebus fy Terror, 43. 

 Inhab. Indian Ocean. Pacific. 



a. Part of the upper jaw, teeth large. 



b. Bones of the ear. India. Presented by General Hardwicke. 



c. d, e. Three skulls. 



