564 PEOCEEDINGS OF THE ACADEMY OF [NoV. , 



deeply below the keel; the base convex, subangular around the 

 umbilicus. Aperture oblique, rounded, the peristome arcuate, 

 unexpanded and thin above, narrowly expanded and subreflexed 

 below the periphery, the margins approaching, separated by the 

 nearly straight parietal margin, which forms less than one-fourth 

 the total circumference of the peristome. 



Alt. 5.5, diam. 10.8 mm.; width of umbilicus (from suture to 

 suture) 3 mm. 



Tobishima, Prov. Ugo (Mr. Y. Hirase, No. 774). 



This species is related to Eulota {PlectotrojiLs) cenmla Gude, but 

 it is smaller with fewer whorls, the last descending in front and 

 with a developed, though usually incomplete, peripheral fringe. 

 E. defiexa is also less conic above, and the nepionic 1^ whorls pro- 

 ject somewhat. 



Eulota (.ffigista) aperta var. cavata "ov. 



Larger and more elevated than aperta, with 6J to 6f whorls, the 

 umbilicus larger, more widely open. Aperture more oblique, the 

 basal margin more deeply arcuate. 



Alt. 9, diam. 16, width of umbilicus 6 mm. 



Alt. 8, diam. 17, width of umbilicus 6h mm. 



Tomisato, Kii (Mr. Y. Hirase, No. 761). 



This form approaches E. {jE<jista) kobensis somewhat, but that 

 is still more open beneath, with the aperture more elliptic. Some 

 specimens from Gojo, Yamato (Mr. Hirase's No. 567), are to some 

 extent intermediate between aperta and cavata in shape, as they 

 are in geographic position. 



Trishoplita Hilgendorfi var. chikubashimae nov. 



Shell smaller and thinner than hUgendorJi from the top of Mt. 

 Ibuki, Omi; very densely and minutely but subobsoletely granu- 

 losc; angular at the periphery in front, the umbilicus smaller. 

 Spire conic; whorls 5 in small, 5|- in large specimens. Aperture 

 rounded-lunate, the peristome thin, expanded. 



All. 7^, diam. 10| mm. 



Alt. 7, diam. 9J mm. 



Alt. 6, diam. 8^ mm. 



Chikubashima, an island in Lake Biwa (Mr. Y. Hirase, No. 

 746). 



In describing T. Hilgendorfj var. tennis in these Proceedings, p. 



