62 THE NAUTILUS. 



The species is near E. Boucardii Salle from Cordova, but differs 

 by smaller size, darker color, less sharp sculpture and the presence 

 of spiral lines. 



From San Sebastian, Jalisco, Mex., E. W. Nelson. 



Coelocentrum astrophorea n. sp. 



Shell pale yellow brown, decollate, with 15 remaining whorls, the 

 first six of which taper, while the rest are subequal ; suture distinct 

 minutely channelled, or with a sharp edged thread on each side of 

 it, surface polished with concavely flexuous small ribs with wider 

 interspaces, on which is visible obscure spiral striation ; last whorl 

 keeled below, projecting, aperture rounded triangular, slightly re- 

 flected, simple ; axis large, pervious except at the base ; within the 

 whorl with a medial keel on each side of which it is excavated and 

 vertically ribbed, while from the junction of keel and ribs small 

 spines like the rays of a star project into the lumen of the whorl. 

 Alt. 30, max. diam. 7, aperture 4'7 mm. 



From Encarnacion, Hidalgo, Mex., E. W. Nelson. 



Though the spines are obviously merely an evolution from the 

 usual nodes, they are remarkable and hitherto unrecorded in any 

 species. 



Schazicheila hidalgoana n. sp. 



Shell trochoid depressed with a rather pointed spire and nearly 

 five whorls ; white with extremely fine close-set rounded riblets in 

 harmony with the lines of growth ; nucleus rounded, smooth ; suture 

 very distinct, slope of the spire flattened a little, periphery obscurely 

 keeled ; aperture rounded-triangular, outer lip reflected with a 

 shallow sinus at its posterior extremity, rounded below with a thick 

 body callus (on which is a keel for the edge of the operculum) 

 uniting the lips ; umbilicus covered by a thin callus, base moder- 

 ately rounded; operculum (lost)? Alt. 8*5, mag. diam. 12, ruin, 

 diam. 9 '5, aperture 6mm. 



Found at Encarnacion, Hidalgo, Mex., by Nelson. 



This species is obviously distinct from any of those heretofore 

 described in this very limited genus. 



ON TWO NEW SPECIES OF AMPHIDROMTJS. 



BY C. F. ANCEY. 



Amphidromus Fultoni Anc. 



Shell sinistral, short, ovate-conic, minutely perforate, thin, ob- 

 liquely striate, subangulate at the periphery, chiefly at the begin- 



