52 BULLETIN 36, UNITED STATES NATIONAL MUSEUM. 



national collection, received Iroin the U. S. Fish Commission, had a 

 large white area on the dorsal fin, and the presence of "a small white 

 spot on the disk of the dorsal and pectoral fin"* in TJ. Forsteri would, 

 therefore, appear to have no special siguificauce. 



Belphinus janira Gray. 



Another species which appears to be identical with I>. delphis is D. 

 janira of Gray. The type of this species, which is in the Bristol Insti- 

 tute, I did not have an opportunity to examine. I did, however, measure 

 a skull iu the British Museum, No. 147(>«, which Gray labeled D. janira, 

 and which agrees iu every particular with the figure of the type iu the 

 Zoology of the Erebus and Terror, except that the beak is a little nar- 

 rower and the opening between the iuterinaxilhe proxinially runs back 

 further and does not end so abruptly. This skull, which is 43.2'''" long, 

 agrees very closely with No. 7063 in the National Museum, from New 

 York Harbor (see table infra). Both seem to represent rather small and 

 narrow-beaked individuals of D. delphis. Skulls Nos. 14:70/> and 1470c 

 iu the British Museum, the latter from Jamaica, aud both labeled 1). 

 janira, are defective, but do not seem to differ from the two skulls just 

 considered. These three skulls are rather small for their apparently 

 mature age, but I see no reasou why they should be regarded as other 

 than small individuals of D. delphis. From these skulls we might be led 

 to suppose that there was a small race of D. delphis peculiar to the West 

 Indies, but the value of this supposition is lessened by the fact tlrit the 

 type-skull of JD. pomeegra, Oweu, the next species to be considered, which 

 is like them iu every particular, is from India. 



Delphinus pomeegraOvie,\\. 



This skull, No. 1478a, in the British Museum, is quite defective. I 

 was unable to find any characters by which it could be distinguished 

 from the preceding. In the table on \). 56 are included measurements 

 of this skull aud of skulls oi B. janira. 



Belphinus Bairdii Dall. 



Another species whose distinctness has been questioned is Belphinus 

 Bairdii Dall (Proc. Cal. Acad. Sci., v, 1873, p. 12), founded on two skel- 

 etons of females from Cape Arguello, California. A male skeleton of 

 this species from Santa Cruz, Cal., was forwarded to the National 

 Museum and has a place iu the register as No. 13802, but unfortunately 

 the specimen has disappeared, and all efforts on my part to rediscover 

 it have thus far proved fruitless. We have, however, in the national col- 

 lection two skulls from the Pacific coast, presumably of this species. 

 The smaller (No. 15403) was collected by Lieut. E. Bergland at the mouth 

 of the San Gabriel Kiver, on San Pedro Bay, considerably south of Point 



' Gray, Catalogue, p. 24P. 



