52 BULLETIN 313, UNITED STATES NATIONAL MUSEUM. 



national collection, received from tbe 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 D. Forstcri would, 

 therefore, iippear to have no special significance. 



Delphinus janira Gray 



Another species which ap])ears to be identical with I>. delpliis is D. 

 janira of Gray. The type of this species, w^iich is in the Bristol Insti- 

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

 aslvull in the British Museum, Ko. 147()<(, which Gray labeled D. janira, 

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

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

 rower and the opening between the interinaxilhe j)roximally runs back 

 further and does not end so abrnjitly. This sknll, which is 43.2*^'" lon^, 

 agrees very closely with No. 70G3 in the National Museum, from New 

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

 narrow-beaked individuals of i>. delpkis. Skulls Nos. 1470/^ and 1470c 

 in the British Museum, the latter from Jamaica, and both labeled />. 

 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 reason why they should be regarded as other 

 than small individuals of 1). delpkis. 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 tint the 

 type skull of />. ponieegra^Owo^w, the next species to be considered, which 

 is like them in every particular, is from India. 



Belphin us pomeegra O wen. 



This skull, No. 1478(t, 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 i). 5G are included measurements 

 of this skull and of skulls of^ D. janira. 



BelpMmis Bairdii Dall. 



Another species whose distinctness has been questioned is Delphinus 

 Bairdii Ball (Proc. Gal. Acad. Sci., Y, 1873, p. 12), founded on two skel- 

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

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

 Museum and has a place in 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. l.')403) was collected by Lieut. E. Bergland at the mouth 

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



* Gray, Catalogue, p. 24P. 



