C E T A C E A. 



31 



30, notwithstanding that it has no dorsal fin. It may be the young 

 of a species of Beluga. 



From Delphinus liastatas the present species appears to differ essen- 

 tially in size, and it is without the large hastate spot on the abdomen 

 which characterizes that animal, and it does not belong to the same 

 generic group. 



To this species, Mr. Peale alludes as follows : 



" While in the water it appears to be entirely black, the white line 

 being invisible. It is remarkably quick and lively in its motions, fre- 

 quently leaping entirelj^ out of the water, and from its not having a 

 dorsal fin, is sometimes mistaken for a Seal. 



" Specimens were taken in the North Pacific Ocean, latitude 4G° 6' 

 50", longitude 134° 5' W. from Greenwich. Great quantities of a 

 species of Anatifa were floating on the surface of the sea, on which 

 they were probably feeding. Two, which had been struck and badly 

 wounded Avith the harpoon, escaped, but the others did not leave the 

 ship as the DeJpJuni usually do when one of their number is wounded." 



From the latitude and longitude given by Mr. Peale, it will be found 

 that the land nearest to the point at which this animal was obtained, 

 is the coast of Oregon. It is, therefore, to be regarded with additional 

 interest as entitled to admission into the Fauna of the United States. 



This species appears to resemble Delpldnapteras only in the absence 

 of the dorsal fin, in which respect it also resembles Beluga, of which 

 it is probably a species. 



2. Genus LAGENORHYNCHUS, Gray, Voy. Erebus and Terror, Mamm. 



PI. XXXIV (1846). 



1. Lagenorhtnchus CtERULEOAlbus [Meyen). 



Delphinus cceruleoalhus, Meyen, Nov. Act. Nat. Cur. XVI, p. 609 (1832). 

 D(:Jj)hinus alhirosl.ratus, Peale, Zool. Exp. Exp. Mamm. p. 34 (1st ed. 1848). 



Atlas, Mammalogy, Plate VI, Fig. 2. 



Though Mr. Peale's figures, from which those in the plate of the 

 Atlas to this volume have been prepared, differ in some measure from 

 the figures of D. cwruleoalhus, in the distribution of the light and dark 

 colors, we have no doubt of the identity of the present animal with 

 that species. The figures of the latter to which we more especially 



