STENO ROSTRATUS. ^7 



of its lenglli, which makes this a very broad-beaked specimen. Meas- 

 ureraeuts from figures, however, are uot always to be relied upon. In 

 the description Cuvier gives the number of teeth as 1^^, while the 

 figure shows 21 in the left side of the upper jaw and 24 in the lower 

 jaw. No. «3047 in the Paris Museum, labeled S. rosfratus, and also 

 hredanensis, belongs to the opposite end of the series. The breadth of 

 the rostrum at the middle is but 12.2 per ceut. of its length. This was 

 probably one of the specimens already in the museum in Cuvier's time. 



Steno comprcssiis Gray. 



The type of this species, No. 2-iGa of the British Museum, is a skull 

 with tolerably narrow rostrum and rather numerous teeth, but appar- 

 ently without other characters serving to distinguish it from the skulls 

 in the Paris Museum and in other collections. It is improbable, there- 

 fore, that it represents a distinct si>ecies. 



DelpMmis reimvardtii Schlegel. 



The type of this species is apparentlythe No. 24 of the Leiden Museum. 

 This is a large skull with a long, narrow rostrum and a rather largo 

 number of teeth (ooEos)- It does not differ from the skulls which Gray 

 called S. compressus, or, in other words, is a narrow-beaked individual of 

 S. rostra f lis. 



DelpMmis hredanensis Van Breda. 



As already stated Van Breda described this species before Cuvier 

 had discovered that the skins originally accredited to S.rostratiis were 

 of quite another species. Van Breda perceived that these skins were 

 different from that of his specimen but concluded that the case was one 

 in which two species very different externally were alike as regards 

 cranial characters. Van Breda's fignre, however, convinced Cuvier that 

 he was in error, and caused him to accept the same as representing the 

 true external characters of his D. frontatus or rostratiis. 



Steno fuscus Gray. 



SlcnofuscHS, Gray, Zool. Erebus & Terror, 1840, p. 44, pi. 2G, fig. 1. 



What the relationships of this species are, and whether it is a Steno 

 at all, must probably always remain in doubt. Gray makes the follow- 

 ing statement in regard to it: 



luLiib. Cuba, W. S. MacLeay, Esq. 



This species is only kuown by a fcetal specimen in spirit, uot in a very good state. 

 Presented to tbo British Museum by W. S. MacLeay, Esq. 



The figure represents an animal rcsamhYiug rrodelphinns obsciirus, or 

 indeed not unlike Van Breda's Steno hredanensis. The forehead is not 

 separated from the beak by a transverse groove. 



