112 THE NAUTILUS. 



Crepidula aculeata Gmel. R. G. S., Maldonado (Rush.) 



Crepidula fornicata Liu. R. G. S. 



Sigaretus maculatus Say, S. C. 



Acmsea onycbiua Gld., S. P. Maldonado. 



Astraliuni olfersi Troschel, S. P. 



Astralium latispina Phil., S. P. 



Omphalius viridulus Gmel. var. brasiliensis Mke. S. P. 



Omphalius patagonicus Orb., Maldonado. 



Lucapinella adspersa Phil. S. P. 



Fissuridea barbadensis var. rosea Gmel. S. P. 



Fissuridea patagouica Orb., Maldonado. 



DESCRIPTION OF A NEW FORM OF CYPR^EA. 



BY JOHN FORD. 



Cypraea cruenta Gmel. var. Greegori n. var. 



Shell depressed, orbicular-oval in form, heavily calloused on the 

 sides and ends. Callus on the sides light salmon in color, with irre- 

 gular purple-brown spots, having a blotchy appearance. Dorsal 

 surface similar to that of crue?i^a, but lacking the whitish spots typ- 

 ically present in that species. Base spotless, salmon colored, darkest 

 in the interstices. Teeth on outer lip very strong, long and whitish ; 

 on inner lip finer, with the exception of the anterior fold, and the 

 adjacent tooth, both of which are very prominent. Space between 

 the anterior fold and the following tooth wide and bright red; 

 posterior teeth of inner lip prolonged outward upon the base. 



Dimensions of an average specimen: length 1\, breadth i inch. 



At a glance this shell appears somewhat related to C. caurica 

 Linn., but a careful examination will show that it is entirely distinct 

 from that species, the columella of caurica being more concave, and 

 the anterior fold bifid in character ; the following tooth of caurica 

 also is less prominent, and the form and color of the species 

 altogether different. 



This variety differs from G. cruenta in being smaller, more 

 rounded in form, entirely lacking spots on the base, and in the 

 peculiar variations of the teeth as described above. 



AVhile most students would probably consider var. Greegori a 

 distinct species, I am inclined to believe it too closely related to G. 



