DELPHINUS DELPIIIS. 



53 



Aigiiello where the orij;iii;il speciiueiis were obtained. The second skull 

 (No. 1^2305) wiis obtained by Mr. Charles II. Townsend at JNIonterey. 

 JJoth these skulls are defective; the smaller is young, while the larger is 

 quite old. In so far as they present characters for comparison I tiud 

 nothing by which to distinguish them from skulls of D. delphis from the 

 Atlantic coasf. 



Mr. Dall was unfortunately unable to compare his skeleton with that of 

 J). flelpMs, to which species D. Bairdii, if distinct, is undoubtedly most 

 closely allied. We have, ho \ ever, for comparison, the measurements of 

 the exterior of the original specimens, given by Scammon (Marine 

 Mamm., p. 100). I place such of these as are comparable by the side of 

 measurements of D. delphis from the Atlantic coast. The conformity of 

 the two series of measurements is certairdy remarkable, and the lack of 

 agreement is apparently not more than would be found to exist between 

 four individuals of the same species. 



Mcasuremeuts. 



Total lenstli 



Leujith of pectoral fin 



Expansion of llukes 



Longitudinal width of tiukes 



Heifjlit of dorsal fin 



Extremity of snout to pectoral flu 



Kxtreniity of snout to doinal fln 



Extremity of snout to aniilo of mouth 



Extremity of snout to oye 



Extremity of snout to blowlule 



(rirth at the anus 



Girth at front of dorsal (in 



Depth of caudal peduncle at origin of flukes 



D. delplds. 

 Off No Man's 



Land, Mass. 

 ?. U.S. E.G. 



75. 5 



11.5 



1.5.5 



G. 



7.0 



18.0 



35. 



11.0 



12.5 



14.0 



22.5 



.39.0 



3.8 



D. delphii 

 Atlantic 

 coast. 9- 



Inches. 

 79.0 

 12.0 

 18.0 

 (J. 25 

 8.0 

 18.0 

 37. 25 

 lis. 6 

 12. 

 13.0 



Eemernbering that these measurements were made by different ob- 

 servers on opposite sides of the continent, I think it will be concciled 

 that they agree as closely as would measurements of different individ- 

 uals of D. delphis made by different persons. 



Scammou's description (p. 93) might be applied to the drawings of 

 East-coast specimen >, which 1 have called ISTos. 1 and 2 (see p. 45), ex- 

 cept that the dark mark before the pectorals in the former is bhu-k in- 

 stead of gray. It is represented as black, however, in JM. Fischer's 

 figure of D. delphis var. soouerhianns.* 



There is also among the drawings in the department of mammals a 

 pencil-sketch by Mr. Dall, in which the boundaries of the lines and 

 areas of color correspond almost exactly in position with drawings Nos. 

 1 and 2. 



From the evidence now obtainable I am unable to distinguish betueen 



* C6tacds fie France, PI. iv, fig. 2. 



