322 MAMMALIA. 



Distribution. — 'Cosmopolitan ; there are in the British Museum 

 specimens from the North and South Atlantic, and from the seas of 

 New Zealand and Tasmania. 



a. Skeleton No history, A.S.B. 



h. Lower jaw Indian Ocean Purchased. 



only. 

 c. Lower jaw Nicobar Isles F. A. de Roepstorff. 



only. 



[The above two probably of this species.] 



Delphinus frithi. 



Delphinus sp., Blyth J. A. S. B., xvi, p. 386 (1847). 



Delphinus frithi, Blyth J. A. S. B., xxviii, p. 492 (1859) ! id. Cat, no. 279, 

 p. 91. 



Distribution. — Probably the Indian Ocean. 



This species, which is represented only by a skull, is 

 closely allied to Delphinus delphis, it has the grooved palate 

 characteristic of the genus as restricted by Flower; the teeth 

 are not in good condition, many of them having fallen out; 

 the number given by Blyth is ^?:5^ but it does not appear that 



6o-5oJ 



there could ever have been more than 45 teeth above and below 

 from the present Ptate of the skull ; the character by which 

 Blyth thought to differentiate this species, namely, the fusing of 

 the premaxillae together in the middle of their length is probably 

 merely due to age and is shown to be also the case in the speci- 

 men of D. delphis figured by Van Beneden and Gervais ; there 

 seems therefore to be no reason why this skull should not be 

 referred to D. delphis; as, however, there is no authentic specimen 

 of D. delphis in the Indian Museum with which to compare it, 

 it will perhaps be better for the present to let Blylh's name stand. 



fl. Skull Indian or Atlantic R. W. G. Frith, A.S.B. 



Oceans. 



[Type of D. frithi, Blyth.] 



Delphinus pomeegra. 



Delphinus pomeegra, Owen Trans, Zool. Soc, vi, p. 23, pi. vi, fig. 3, pi. viii 

 (1866) ; Flower List Cetacea B. M , p. 20. 



Distribution. — Bay of Bengal. 

 Probably conspecific with D. delphis. 



[No specimen in the Indian Museum.] 



Delphinus longirostris. 



Delphinus longirostris, G. Cuvier Regn. Anim., 2nd ed., p. 228 (1829)* 

 Van Beneden et Gervais Osteog. des Cetaces, p. 604, pl.xxxix, figs. lo-il. 



