374 



SQ.UALID.E. 



of the two, I avail myself, by permission, of the comparative 

 description therein given. 



" Length from two to three feet. According to M. 

 Blainville, this species attains to a larger size than the last. 

 Differs essentially from S. canicula in the structure of the 

 lobes of the nostrils, and in the form of the ventrals:* the 

 former are not united as in that species, and of a smaller 

 size, leaving the whole of the mouth and the upper lip visi- 

 ble : the ventrals, instead of being cut obliquely, are cut 

 nearly square, their posterior margins meeting at a very ob- 

 tuse angle ; they are united or separate according to the sex, 

 in a similar manner : the snout is rather more elongated ; 

 and, according to some authors, the tail rather shorter, giving 

 the dorsal a more backward position ; but this last character I 

 have not noticed myself. Upper parts brownish grey, with 

 very little of the red tinge observable in the last species : 

 back, flanks, and tail, sparingly marked with large spots of a 

 deep brown or black colour : under parts whitish." 



* See the vignettes of the nostrils and the ventral fins of both species. 



