60 



BULLETIN 36, UNITED STATKS NATIONAL MUSEUM. 



DELPHINUS K0SEIVENTRI8 Wagner." 



Delphinus i-oseivcntris, Wagner, Scbreber's Siiiigetl]., PI. CCCLX, fiir. I. 

 Dauphin u ventre rose, Jufqniuot & Piiclieraii, Zool. Vo^'age Astrolabe et Z6I60, iii, 

 18.53, p. 39; Atlas, PL 2-i, fig. 2, PI. 23, figs. 3-4. 



I am led to retaia this species in the j?enus Delphinus (restricted) 011 

 account of the form of the palate and the style of coloration of the 

 exterior. 



Pucheran and Jacqninot had three skulls before tliem when at work 

 upon their account of the species. Two of these skulls, N"os. «3026 and 

 a3027, are in the Paris Museum ; the third (apparently) is No. 509 of 

 the museum of Cambridge University. There are figures of both skull 

 and exterior in the atlas of the voyage, and the former is also figured 

 in Messrs. Van Beneden and Cxervais' O.steograi)hie, PI. xxxviii, figs. 

 and Ga. 



The skulls are peculiar for their sm;iil size and the unevenness of the 

 surface of the different bones. Tiie palate shows a condition in some 

 measure intermediate between that found in Frodclphinus and that char- 

 acteristic of Delphinus. The pterygoids are narrow and small, as in 

 Delphinus, and a distinctly marked cliannel extends on either side of 

 them nearly to the extremity of the beak. The>e channels are in no 

 wise so deep, however, as in D. delphis or L). longirostris 



In proportions it differs from the other species of the genus. Its small 

 absolute size would alone serve to distinguish it from the remaining 

 species. 



Tabic of measurements. 

 DELPHINUS ROSEIVENTRIS. 



* So far as I have beeu able to ascertaiu, tbe custom of citing Wagner as the author- 

 ity for the name of this species has arisen simply f:om the fact that the name occurs 

 on one of the jjlates which accompany the seventh part of Scbreber's Sliugethiere. 

 The. species is not mentioned in the text, nor even in the list of plates. 



t L'Astrolabe, 1840. 



t Voyage de I'Astrolabe. 



