1904.] NATURAL SCIENCES OF PHILADELPHIA. 



625 



pendently arisen having a tendency toward recession of the closing 

 apparatus. 



HEIilCINID^. 



Helicina verecunda degener n. subsp. 



Similar to H. verecunda Gld., Except that it is decidedly smaller and 

 somewhat more elevated. 



Alt. 3.2, diam. 4.3 mm. 



Okinoerabushima, Osumi. Types No. 87.686, A. N. S. P., from No. 

 1,255 of Mr. Hirase's collection. Also Yoronjima. Osumi (1,255a). 



HELIOID^. 



Eulota (.Egista) friedeliana var. humerosa n. n. 



This name is to replace that of E. friedeliana goniosoma P. and H., 

 preoccupied. 

 Eulota (JEgista) omma n. sp. 



The shell has the general shape of E. ocidus (Pfr.). It is yellowish 

 olivaceous-brown, densely obliquely striate above, more glossy and 

 smoother below, the first two whorls nearly smooth. Whorls 7, but 

 •slightly convex, enlarging slowly and regularly; the last whorl slightly 

 deflexed in front, obtusely angular at the periphery, the base very con- 

 vex. The deep and ample umbilicus is nearly one-third the diameter 

 of the shell; its last half-whorl enlarges more rapidly. The aperture 

 is rather small, hardly larger than the umbilicus, oblique, rounded, the 

 preceding whorl excising about one-fourth of the circle. Peristome 

 narrowly refiexed throughout, the columellar margin very steeply 

 ascending, hardly dilated. 



Alt. 10.5, diam. 17 mm. (Taramajima, Xo. 87,574). 



Alt. 11.5, diam. 19 mm. (Taramajima, fossil. No. 87,575). 



Alt. 10, diam. 18 mm. (Riukiu, No. 83,917). 



Taramajima, Riukiu. Types No. 87,574, A. N. S. P., from No. 998a 

 of Mr. Hirase's collection. Also found fossil in sand at the shore. No. 

 ^7,575 (Hirase's No. 9986). 



This species was at first thought to be the Formosan jEgista suh- 

 chinensis 'Nevill' Mlldff.,^ but further stud}' of the description and 

 the finding of a Formosan specimen in the collection of the Academy 

 have shown that material differences exist l^etween the Formosan and 

 Riukiuan forms. In subchinensis the columellar margin slopes to 

 the insertion instead of rising almost vertically as in E. omma — much 

 more steeply in fact than in E. ocidus, which is the most closely related 

 species. 



3 Jahrb. d. D. Malak. Ges., XI, p. 355, PI. 7, fig. 8. 



