1905.] NATURAL SCIENCES OF PHILADELPHIA. 731 



ture of low oblique wrinkles along the lines of growth, and minute, very 

 short cuticular adnate threads in places; the base densely but not very 

 distinctly striate spirally. Peripheral filaments sparse and short. 

 Whorls 6^, slowly widening, the early ones convex, the later nearly 

 flat; last whorl acutely carinate, the base angular around the umbili- 

 cus. Aperture very oblique, the lip narrowly expanded, basal margin 

 narrowly reflexed, deeply arcuate; columellar margin dilated; parietal 

 callus very thin. 



Alt. 10, diam. 26.7 mm. 



Anshiryozan, Taiwan. Types No. 89,984 A. N. S. Phila., from No. 

 1,433 of Mr. Hirase's collection. 



A delicate and handsome Plectotropis of the mackensii group, with 

 narrower spire and wider last whorl than mackensii, wide-spaced per- 

 ipheral filaments, finer sculpture, and openly conic umbilicus. 



Eulota fulvicans (H. Ad.). 



P. Z. S., 1866, p. 316, pi. 33, fig. 2. 



Tamsui (Swinhoe). 



Eulota (Plectotropis) fulvicans browni n. subsp. 



Shell low trochoidal, umbilicate, the umbilicus one-fifth the diame- 

 ter of the shell; thin, pale brownish corneous. Surface dull, lusterless, 

 densely beset with very short, delicate, erect bristles, in large part removed 

 by wear from the upper surface. Spire conic, its lateral outlines a tri- 

 fle convex. Wliorls 6f , slowly widening, the last very little descend- 

 ing in front, acutely carinate throughout, the base convex. Apertiu-e 

 very oblique, slightly angular outwardly. Peristome thin, expanded, 

 the basal margin reflexed, columellar margin dilated, running forward. 



Alt. 7.9, diam. 12.5 to 12.7 mm. 



Formosa (Taiwan). Type No. 4,639 A. N. S. Phila., part of the 

 A. D. Brown collection. 



This form diiTers from E. perplexa in sculpture. It is not so high as 

 E. fulvicans H. Ad., and the shape of the aperture differs. E. fulvi- 

 cans is known to us by the description and figure only. E. lautsi 

 brachylasia S. and B. is also related. 



Eulota (Plectotropis) lautsi (Schm. and Bttg.). 



Xachrbl. d. iii. Ges., 1890, p. 4, pi. 1, fig. 1. 



H. shermani var. lautsi S. and B., Nachrbl., 1S91, p. 154. 



South Cape (Lauts); Bankimtsong, Takao (Schmacker). 



Eulota lautsi brachylasia (Schm. and Bttg.). 

 Nachrbl. d. m. Ges., 1891, p. 156. 

 Takao. 



