44 



notch ; teeth conical, acute, ||- ; head narrow, and rather 

 compressed at the orbit. 



rnhab. ? 



We possess two skulls of this species, which is easily 

 known from the former by being much more slender and 

 more attenuated in front, and by the liead, though longer, 

 being 2^ inches narrower over the orbit ; lower jaw nearly 

 straight below, united for more than ^ its length. 



Length, entire, 20'6 inches and lines. 



„ ofnose 13 



„ of lower jaw, .... 17 

 „ of symphysis, .... 64- 



Width of notch, "^ 3-6 



„ at orbit, 6'9 



This may be the same as D. rostiafiis, but the teeth are 

 more numerous ; and Cuvier's figure, which he thought 

 might be Breda's species, certainly much better repre- 

 sents a common Indian species than this. 



Var. 1. Nose rather shorter and more depressed. 



The Attenuated-beaked Dolphin. Steno attenuatus. 

 Tab. 28. Skull. 



Delphinus attenuatus, Gray, List Mam. B. M. 



Nose of skull -| of entire length l-^ the length of the 

 skull, 2| the length of the width of the notch, slender, ta- 

 pering in front ; intermaxillaries forming a long triangular 

 part of the front of the palate ; vomer elongate, in middle 

 of palate ; teeth ^. 



luhab. ? a. b. c. 



Length, entire, 15"9 in. 16'6 in. 15'6 in. 



„ ofnose, 8-9 100 9-3 



„ of lower jaw, .... 13-3 .... 13-0 



Breadth of temples, 6-0 6-5 6-1 



„ of notch, 3-3 3-3 3'6 



„ of middle of beak, \Q 1-7 I'S 



„ of intermaxillaries, O'Ol "1 I'lO 



The Cuban Steno. Steno fuscus. 



Tab. 26. Fig. 1. Foetus and Tongue. 



Black above and below, in spirits. Head conical ; 

 gradually tapering into a rather long nose, without any 

 separating groove, with five black whiskers on each side. 



Teeth ? 



Lihab. Cuba, W. S. MacLeay, Esq. 



This species is only known by a festal specimen in spirit, 

 not in a very good state. Presented to the British Museum 

 by W. S. MacLeay, Esq. 



Tt is very peculiar for the elongated tapering head, the 

 pectoral fins are rather large, strongly falcate ; the dorsal 

 rather beyond the middle of the back. 



The tongue is flat on the top, and nearly as broad as the 

 space between the sides of the jaws ; it is entire on the 

 edges of the sides, and slightly dilated in front, crenulated 

 on the edge, and with a larger flat lobe in the middle of 

 the tip. See t. 26,/. 1, a,l),c. 



Mr. Branston has sent me a specimen oi Beluga catodon, 

 with the tongue in the head, in salt. The tongue is oblong, 

 with a simple, slightly raised edge. It is figured in Plate 

 29, fig. 3. The tongue ap]3ears to have been drawn towards 

 the gullet when the head was separated. It thus appears, 

 that each of the different genera has a peculiar kind of 

 tongue ; this is worthy of further investigation. 



The foetus of Phoca-na has two bristles on each side of 

 the nose; as the animal grows, these bristles fall out, and 

 each leaves a small pit on the side of the nose, which 

 Klein {Hist. Piscium, i. 24) mistook for the nostrils, as has 

 been well observed by Prof. Eschricht, 250. 



The following species require further examination. 



1. Delphinus pseudodelphis, Weigm. Schreh. t. 378, 

 skull. 



Teeth 44 or i|. 

 Inhab. ? Mus. Leyden. 



" Skull in the form of D. Malayanus, but beak shorter, 

 and teeth shorter and thinner, very like those of D. Del- 

 phis. Palate not grooved. Symphysis of lower jaw rather 

 long." 



This may be the same as the Steno attenuatus, but our 

 copy of Schreber does not contain the plate referred to. 



2. D. velox, Dussum. Cuv. R. A. i. 288. F. Cnv. Man. 

 Lith. t. Cetac. 154. 



Teeth -|4 ; grey, lips and lower jaw whitish, F. Cuv. 



Teeth, ^4 ; nose rather more elongated. Cuvier. 

 Inhab. Ceylon. 



3. Delphinus Boryi, Desm. Mam. 515. Diet. Clas. 

 H. N. t. m,/. 2. 



Inhab. Madagascar. (Coast of New Holland ?) 



4. ? D. Bertini, Desm. from Duham. Pech. t. 3,/. 10. 



Cachalot? Bhiinv. 



No teeth in lower jaw, but has a beak. 

 Inhab. .? 



5. D. Chinensis, Desm. from Osbeck, Voy. 



Shining white. 

 Inhab. Chinese seas. 



The following species have been named and figured by 

 the sight caught of them when swimming ! 



D. cruciger, Quoy ^ Gaim. Voy. Uran. t. 12, f. 3, 4. 

 D. albigenus, Quoy, I. c. t. \\,f. 2. D. rhinoceros, Quoy, 

 I. c. t. 11,/. 1, all from New Holland. 



D. bivittatus. Lesson, perhaps the same as D. cruciger. 



D. lunatus, Lesson, Voy. Coq. t. \\,f. 4. 



D. leucocephalus. D. minimus and D. maculatus, Lesson, 

 Voy. Coq. i. 183. 



The following species have been named onlv from fi- 

 gui'es or very slight descriptions. 



