234 THE P. GRISEUS. 



parison, however, exhibits many distinctive charac- 

 ters. Their heads are quite differently shaped, and 



the dental formularies are, of this species , origi- 

 nally pointed, but soon blunted ; and of the Deductor 

 , , conical and sharp, and locking into each other 

 like the teeth of a rat-trap. The Deductor is twice 

 the size of the Griseus ; the dorsal fin, in this latter, 

 is much more elevated ; the colouring, too, is diffe - 

 rent. D'Orbigny mentions that two out of the 

 four stranded in 1822 had the dorsal fin destroyed, 

 but whether from disease or the attacks of other 

 animals could not be determined. That it was 

 violently removed was however apparent. 



Individuals of this species have usually been 

 brought to the coast by the violent tempests which 

 sweep into the Bay of Biscay and agitate its 

 troubled waters. They are famous for uttering loud 

 cries, and thus attracted the attention of Baron 

 Cuvier ; but as we have already alluded to this cir- 

 cumstance (see p. 55, 56), we shall not dwell upon 

 it in this place. 



THE STRIPED PORPOISE. 



PLATE XXII. Fig. 1. 

 P. Bivittatus. Delphinus Bivittatus, Less. 



THE only other species of this extensive and well 

 known genus, which we shall submit to the atten- 

 tion of our readers, is remarkable as being one of the 



