both have been considered as distinct species, from the variation in 

 their colouring, and more particularly from the limited habitat assigned 

 to each. These comparisons have perfectly justified Mr. Mower in 

 uniting the two so-called species, and bestowing upon the animal a 

 much wider range of habitat. 



This able zoologist concludes his interesting remarks with : " They 

 (the two recently acquired), according to the coloration, should be 

 Rissoanus ; according to the habitat, they should be griseus. As to the 

 teeth, the new specimens completely break down the specific distinction 

 previously drawn ; for, with the coloration of G. Itissoamis, the adult 

 one has the number of teeth assigned to Cr. griseus, viz., ?." 



It thus appears necessary, until better diagnostic characters are 

 made out, to sink the name of Rissoanus in that of griseus, though it 

 may be convenient to apply the term Eisso's Dolphin to the peculiarly 

 marked variety which was first made known to science by that 

 naturalist. Selected from Floiuer. T.Z.S., vol. 8, part 1. 



Habits migratory, visiting shores of Europe in summer, passing 

 winter either to the south towards the coast of Africa, or to the west 

 towards the American continent. 



