1905.] NATURAL SCIENCES OF PHILADELPHIA. 733 



edge, becoming weak near the aperture; slightly descending in front. 

 Suture well impressed. Aperture oblique, broadly lunate, the peris- 

 tome thin, narrowly expanded, the columellar margin dilated above; 

 basal margin deeply arcuate. 



Alt. 5.4, diam. 7 mm. ; width of aperture 3.3 mm. 



Suganiikei, Taiwan. Type No. 90,047 A. N. S. Phila., from No. 1,390 

 of Mr. Hirase's collection. 



Very rare, as only two fully adult shells were found. With as many 

 whorls as E. inrinensis, this species is smaller, more elevated, with a nar- 

 rower umbilicus and a more deeply arcuate basal lip. It has much 

 the shape of the far larger E. fulvicans (H. Ad.). 



Enlota (Pleototropis) perplexa n. sp. 



Shell trochoidal, thin, rather openly umbilicate, the umbilicus about 

 one-fourth the diameter of the shell, rapidly contracting inward. Sur- 

 face dull, covered with a brown cuticle, sculptured with minute closely 

 placed, short, linear, raised processes above the periphery, with an 

 under-sculpture of indistinct fine spiral lines; below the periphery it 

 is very closely engraved with fine spiral lines. The spire is conic, with 

 straight lateral outlines. Whorls 6^, slowly increasing, but slightly con- 

 vex, the last with a slightly projecting, acute keel at the peripher}^ 

 descending slightly below the keel to the aperture. Suture well im- 

 pressed, following the lower edge of the keel. Aperture oblique, per- 

 istome thin, the basal and outer margins narrowly reflexed, arcuate, 

 the upper margin but slightly arcuate, hardly expanded, columellar 

 margin nearly vertical, arcuate, dilated above; parietal callus very 

 thin. 



Alt. 8.2, diam. 12 mm.; diam. of apertiu-e 5.3 mm.; of umbilicus 

 nearly 3 mm. 



Suganiikei, Taiwan. Types No. 89,874 A. N. S. Phila., from No. 

 1,377 of Mr. Hirase's collection. 



This snail is related to E. granti Pfr., E. fulvicans H. Ad. and 

 especially to E. lautsi brachylasia S. and B., a decidedly less elevated 

 form. 



Eulota (Pleototropis) granti (Pfr.). 



P. Z. S., 1865, p. 828, pi. 46, fig. 10. 

 Formosa (Swinhoe). 



Eulota (Aousta) assimilis (H. Ad.). 



P. Z. S.. 1866, p. 316, pi. 33, fig. 1. S. and B., Nachrbl., 1891, p. 158. 



Mlldff., Jahrb., XI, p. 370. 



Takao (Swinhoe, Steere). 



