1893.] NATURAL SCIENCES OF PHILADELPHIA. 311 



C. caurica Linn. Melvill, if one may judge by his published state- 

 ment, appearing somewhat doubtful as to whether it was the off- 

 spring of G. cruenta, of C. caurica, or of both species. 



No description of the shell other than that published by the 

 speaker, was given until July, 1893, when a summary of the speaker's 

 observations over Mr. Melvill's signature appeared in the Quarterly 

 (English) Journal of Conchology. 



The full description of the species (published in The Nautilus, 

 August, 1892,) is as follows: — 



Cypr.ea Greegori Ford, n. sp. 



Shell depressed, orbicular oval in form, callus on the sides and 

 ends remarkably thickened. That on the sides light salmon in color, 

 with irregular purple-brown spots, having a blotchy appearance. 

 Dorsal surface similar to that of cruenta, but lacking the whitish 

 spots typically present in that species. Base semi-translucent, spot- 

 less, dark buff or salmon colored, darkest in the interstices. Teeth 

 on outer lip very strong, long and whitish ; on inner lip finer, with 

 exception of the anterior fold and one or two adjacent teeth, the first 

 , of these latter being very prominent and notably transverse. 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 average specimen : length H, breadth | inch. 



That C. Greegori is more nearly related to C. cruenta than to 

 any other species, Mr. Ford had no doubt. Nevertheless, the fact 

 remains that the former possesses several characters altogether 

 distinct from those belonging to the latter. 



C. Greegori is for instance, more translucent, less variable, more 

 rugged, much smaller and rounder in form, different in general 

 color, and in the peculiar variations of the teeth ; also in the 

 remarkable thickness and brilliancy of the callus with which it is 

 rimmed. 



With exception of one poor specimen, the shell was unknown to 

 the late Mr. Tryon, and for the same reason perhaps, it was not 

 noticed by Mr. Roberts in his catalogue of the species. 



