64 THE NAUTILUS. 



rather than a distinct genus; but the total lack of a basal notch or 

 truncation is a character usually considered of generic importance. 



P. Eovirosai n. sp. (PI. Ill, figs. 8, 9.) 



Shell oblong-conic, very solid, whitish, encircled by numerous nar- 

 row smooth spiral lirse of a dark brown color, and somewhat 

 alternating in size. Spire conical, ai:)ical whorl eroded ; whorls 5 

 remaining, slightly convex, the last whorl large, regularly convex. 

 Aperture a little less than half the length of the shell, ovate, angular 

 above; outer lip regularly acute; inner lip strongly calloused. 



Alt. 20, diam, 12 mill, (old specimen.) 



Alt. 16J, diam. 9f mill, (young specimen.) 



Two specimens are before me, collected by Prof Rovirosa at the 

 mountains of Poana, State of Tabasco. The older individual (PI. 

 Ill, fig. 8) is considerably worn ; the other is perfect but not 

 wholly adult, and neither contains the operculum. The species is 

 allied, apparently, to the Cuban Melania brevis Orb., but is 

 decidedly longer, and the lira^ are much stronger. 



Explanation of Plate III. 



Figs. 1, 2, 3, Chrysodomus (Sij)ho) Stonei Pils. 

 Fig. 4, Eucalodium compactum Pils. 

 Fig. 5, 6, Pachychilus glaphyrus var. 

 Fig. 7, P. glaphyrus var. potamarchus Pils. 

 Figs. 8, 9, Potamanax Bovirosai Pils. 



NOTE ON CYPR^A GREEGORI FORD. 



BY EDGAR A. SMITH. 



I sincerely trust that Mr. Ford^ wrongly estimates the critical acu- 

 men of modern conchological students. He says that most of them 

 would probably have made C. Greegori a species instead of a variety. 



There is no doubt that the new French School of Conchologists 

 would agree with Mr. Ford in considering the shell in question spe- 

 cifically distinct from C. cruenta, but I am glad to say that in Eng- 

 land (and I hope in America also) the ideas are not so advanced (?). 

 Although examples of this shell have been in the National collect- 

 ion for more than 50 years, no British author has ever suggested 

 that they belonged to a distinct species. 



1 Nautilus, Vol. vi, p. 112, Vol. vii, p. 39. 



