[ 82 ] 



Some Notes on the Genus Cumanotus. 



By 

 Nils Odhner. 



Fil Lie, Stoi-khohn. 



In 1908 Sir Charles Eliot published in the Journ. Mar. Biol. Assoc, 

 Vol. VIII, No. 3, a paper " On the Genus Cumanotus " ; in that paper 

 he showed that Coryphella heaumonti, discovered and named by him in 

 1906,* was to be referred to the above genus, which had been first 

 established by myself in 1907 from a study of the Norwegian 

 C. laticcps, described at the same time as a new species.f 



Sir Charles Eliot also called attention to the striking resemblance 

 of the two forms, and remarked that their identity was not improb- 

 able, though he assumed that there might be some difierences in the 

 denticulation of the jaws and the lateral teeth of the radula. 



Through the kindness of Sir Charles Eliot and of Mr. De Morgan, 

 Acting-Director of the riymouth Laboratory, I have procured two 

 specimens of C. hrauvionti for comparison with the Norwegian 

 C. laticcps, with a view to determine the distinguishing characters 

 of the two forms. 



In exterior appearance they are quite alike, and I have found no 

 difference of a specific value in their habitus. The proportions of the 

 body are nearly the same, as is evident from the following measure- 

 ments (in mm.) : — 



The height of the body was somewhat greater in C. heanmonti than 

 in C. laticcps, which probably depends on their varying states of 

 preservation. 



* "Notes on Some British Nudibranchs," I.e., Vol. VII, No. 3, 1906. 

 f "Northern and Arctic Invertebrates, III, Opisthobranehia," K, Sv. Vd.-Akad. 

 Handl., Bd. 41, No. 4, 1907, 



