DELPHINUS DELPillS. .0.) 



Arguello where the uiij;iiuil jspeciinens were obtained. The secoud skull 

 (No. 'Z^oO^) wiis obtained by Mr. Charles U. Townsend at Monterey. 

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

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

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

 Atlantic coast. 



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

 J), (lelphis^ 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 Scammou (Marine 

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

 measurements of I), delphis from the Atlantic coast. The conformity of 

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

 agreement is apparently uotmore than would be found to exist between 

 four individuals of the same species. 



Mcasureraeuts. 



Total length 



Length of pectoral i5n 



Expansion ot link 03 



Longitudinal width of Hiikes 



Height of dorsal lin 



Extremity of snout to pectoral fin 



Extremity of snout to dorHnl fin 



Extremity of snout to angle of mouth 



Extremity of snout to oye 



Extremity of snout to ijlowhole 



Girth at the anus 



Girth at front of dorsal fin 



Depth of caudal peduncle at origin of flukes 



D. delphis. 

 Otf No Man's 



Land, Mass. 

 ?. U. S.F. C. 



Inches. 



75.5 



11.5 



15.5 



CO 



7.0 



18.0 



35.0 



ILO 



12.5 



14.0 



22.5 



39.0 



3.8 



jD. delphis. 

 Atlantic 

 coast. ?. 



In 



hes. 

 79.0 

 12.0 

 18.0 

 6.25 

 8.0 

 18.0 

 37. 25 

 10.6 

 12. 

 13.0 



Remembering that these measurements were made b}^ different ob- 

 servers on opposite sides of the continent, 1 think it will be conceded 

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

 uals of D. delphis made by different persons. 



Scammon's description (p. 99) might be applied to the drawings of 

 East-coast specimen >, which 1 have called ISTos. 1 and 2 (see p. 4:5), ex- 

 cept that the dark mark before the pectorals in the former is black in- 

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

 figure of D. delphis var. soouerhiamis.* 



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

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

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

 1 and 2. 



From the evidence now obtainable I am unable to distinguish between 



* C<5tacds do France, PI. iv, fig. 2. 



