412 THE CANADIAN NATURALIST. [Vol. X. 



sent species, I think it well to place it in the genus or sub-genus 

 Discites of McCoy ; remarking, however, that it might be in- 

 cluded in Trematodlscua, should that sub-genus be sustained. 



LOXONEMA CARA, S.N. 



Shell small, elongate. surf;tce polished .-md shining, volutions 

 about eight, regularly curved and marked by about thirty thin 

 vertical ridges crossing the whole of each volution. Aperture 

 apparently regularly oval. Length 7 millimeters, breadth at 

 second turn 2 millimetres. It somewhat resembles a species 

 figured but not named in Worthen's Illinois Reports, Vol. V, 

 Plate XXIX, fig. 3. 



This beautiful little .shell was found by Mr. W. Gurley, of 

 Danville, Illinois, in specimens of limestone from Windsor, Nova 

 Scotia, and was by him kindly communicated to the writer. 



Pleurotomaria Acadica, S.N. 



Somewhat elongate, volutions four, nearly horizontal at the 

 suture and bending downward at a risht ansrle, 2;ivini>; them a 

 square section, especially in the lower volutions. On the body 

 whorl the angle between the upper and lateral surfaces forms a 

 distinct ridge. Surface otherwise quite smooth. Length 4 

 millimetres. It is allied to P. Chesterensis of Meek and Worlhen 

 and to P. altlvittafd of ^IcCoy. 



From collections made by Prof Hartt, at Windsor, Nova 

 Scotia. 



SaNGUINOLITES BroOKFIELDIANUS, S.N. 



Among my specimens from the Lower Carboniferous Lime- 

 stones of Nova Scotia, there have been for many years casts and 

 fragments of a bivalve shell of the above genus, but too imper- 

 fect for description. In a recent visit to Brookfield I obtained 

 better specimens, and now venture to describe the species as 

 follows : — 



Shell more than twice as large as wide, anterior end regularly 

 rounded, hinge line straight, ventral line slightly and regularly 

 curved, posterior end sub-truncate. An oblique ridge extends 

 from the beak to the latero-posterior angle. In front of this 

 ridge the sides are marked with unequal concentric ridges of 

 growth, behind it the surface is smooth, but in well-preserved 

 specimens shows two slender longitudinal ridges dividing the 



