68 BULLETIN -M, UNITED STATE8 NATIONAL MUSEUM. 



3. PRODELPHINUS FRCENATUS (F. Cuvier). 



DcIijhiiiHS froctialus, F. Cuv., Mamm. de la Meuag., liv. 58, liv. 59; Hist. uat. des 



cctaces, I8;3i), p. 155, pL 10, fig. 1. 

 liilphUias fron'.alis, Dnssiimier, in Cuv. Et-gne Animal, i, p. 288. {Fide Wagner.) 

 DeliiltiiiuH dori.s, Gray, Zool. Ere. & Terr., 1846, p. :J9, PI. xx. 

 f Delphiiiiis diibitis, G. Cuv., Ann. du Mnscnni, xix, 1812, p, 14. 

 Dcliihiinis cljjmeve, Gray, Cat. Seals and Whales, 186G, j). 241). 

 CIjjDtoiia normalis, Gray, Proc. Zool. Soc. London, 186G, p. 214. 



'Jhe relatioiisbips of these three species (if snch they be) are so close 

 t hat 1 ha^ e thought best to consider them coujoiutly. Professor Flo^Ye^ 

 has said [LiaU p. 30) that — 



Though single well-marked specimens of Gray's Chjmenia dor'ts and Sfoio altenuattis 

 may be so unlike as to justify their being placed in distinct species, yet when a large 

 series, such as those of the British Museum and College of Surgeons combined, are 

 compared together, the two extremes pass so insensibly into each other that it is 

 ditlicult to avoid the suspicion that the differences depend upon age, or sex, or on 

 individual variation. Unfortunately these forms are known at jjresent only hy skulls. 

 When the remaining parts of their organization can be correlated with them proba- 

 bly other specilic distinctions will be demonstrated. 



That it is uusoimd to combine all these nominal species at present 

 appears from the fact that there are indications that the exterior of the 

 individuals from which some three or four of the skulls were derived dif- 

 ered mncli in appearance. 



In the atlas of the Voyage of the Coquille (pi. 9, fig. 5) is figured the 

 exterior of a doli)hin, taken between Java and Borneo, and in the 

 text styled I), malayanus. With this species Schlegel, in tlie Abliand- 

 lungen, identifies a skull from Celebes, two skulls from Java, and a 

 young individual, somewhat over one and one-half feet long, from 

 Borneo. This individual appears to have been a suckling, as is indi- 

 cated both by its size and by the fact that "it still had some hairs 

 on the sides of the snout," and that the teeth were "still only incom- 

 pletely broken through the gums." "The color is bluish-black gray, 

 the under parts somewhat clearer." The skull from Uelebes, which I 

 examined, closely resembles the type of Gray's C. atfcnv.afus, but is ab- 

 solutely larger, with relatively longer beak and shorter tooth-row. The 

 number of teeth is, however, nearly the same. 



Of the individual which served for the type of />. malayanus of the 

 Coquille no parts appear to have been brought home. The color is de- 

 scribed as " uniformement cendree." * It was 5 feet 11 inches (French) 

 long. 



It is, of course, impossible to determine whether Schlegel's identifica- 

 tion of his specimens with I), malayanus was a correct one, but the 

 young individual was at all events not unlike that species in color. 



In the alias of the Voyage of the Astrolabe and Zelce (pi. 21, fig. 2; 

 pi. 23, figs. 7 and 8) are figured the skull and exterior of another dark 



"AH the -figin-es on plate 9 of the atlas of the Coquille are colored bluish-green, 

 which ia evidently not intended as the natural color. 



