1901.] NATURAL SCIENCES OF PHILADELPHIA. 563 



the suture, rounded peripherally and less so beneath, narrowlv 

 impressed around the umbilical perforation. Aperture large, but 

 slightly oblique, very broadly lunate; peristome simple, a little 

 retracted at the upper insertion, basal margin straightened, the 

 columellar margin short, subvertical, dilated. 



Ait. 6, greater diam. 11J?, lesser 10 mm. 



Nachi, Prov. Kii (Mr. Y. Hirase, No. 785). 



Well marked by the narrow perforation, small spire, sculpture 

 and the shape of the aperture. M. perfragilis Pils. of Kunchan, 

 Okinawa, is a closely related species, differing in the much larger 

 size, smaller perforation, etc. 



Eulota (Plectotropis) pannosa n. sp. 



Shell similar to trochula A. Ad. in general shape; light brown, 

 somewhat translucent. Surface slightly shining, sculptured with 

 very minute spiral striae under sparsely scaly oblique cuticular 

 striae, with, at the periphery, a long, ragged fringe of flattened 

 filaments, triangular at their bases. Spire low-conic. Whorls 

 sligntly over 6, slowly and regularly increasing, a little convex, 

 acutely carinate peripherally, convex beneath, being elevated and 

 subangular around the deep, broadly open umbilicus; the last 

 whorl very slightly descending in front. Aperture oblique, the 

 peristome hardly expanded above, thickened within and expanded 

 and somewhat reflexed below. 



Alt. 8J, diam. (exclusive of fringe) 17 mm.; width of umbili- 

 cus (from suture to suture) 4^- mm. 



Atsumi, Prov. Uzen (Mr. Y. Hirase, No. 773). 

 This species differs from E. trochula in being much more angular 

 around the umbilicus, trochula being rounded there. E. vulgivaga 

 is a more solid shell, with the umbilicus wider and the base more 

 convex. 

 Eulota (Plectotropis) deflexa n. sp. 



Shell small, biconvex, widely and openly umbilicate, brown. 

 Surface dull, sculptured with subobsolete, fine spiral striae and slight 

 spaced growth-wrinkles, bearing a few cuticular threads and scales 

 above, more numerous short scales beneath, with a peripheral fringe 

 of flattened, ragged filaments. Spire low-conic. Whorls 5J, the 

 first 1 J convex, following whorls less so, the last whorl acutely 

 carinate, descending near the aperture for some distance and rather 



