152 



GENUS ATELECYCLUS. 



(Hippo) septemdentatus. There are now several other 

 species known, one of which A . cruentatus, is found on the 

 coast of France, and probably in the Mediterranean. It 

 appears very nearly to resemble our species, and may pos- 

 sibly be a variety of it. The group is a very natural one, 

 and its characters well defined, but its geographical distri- 

 bution is so extensive as to set all ordinary laws at defi- 

 ance ; I have a well-marked species, hitherto undescribed, 

 which was procured on the western coast of South America 

 by Mr. Cuming. 



