1899,] KATURAL SCIENCES OF PHILADELPHIA. 525 



ADDITIONS TO THE JAPANESE LAND SNAIL FAUNA. 

 BY HENRY A. PILSBRY. 



The forms described below occurred in a collection of Japanese 

 mollusca obtained by Marshall K. Gaines, President of Tillotson 

 College, Austin, Tex., while resident and engaged in educational 

 work in Japan some years ago. 



They were chiefly collected by his pupils; and being accom- 

 panied by exact locality data, are a substantial addition to our 

 knowledge of the terrestrial mollusks of Japau. 

 Diplommatina tenuiplica n. sp. 



Shell similar in form, size and external sculpture to D. collari- 

 fera Schra. and Bttg,, but of a reddish brown color, the columellar 

 lamina within the whorl decidedly thinner and weaker, less ob- 

 lique ; lamina within the outer wall (visible through from the out- 

 side on the front of the last whorl) distinctly shorter. Crest 

 behind the lip less developed and nearer the lip. 



Kashima, Harima (Marshall R. Gaines). 

 Ennea Iwakawa n. sp. PI. XXI, fig. 10. 



Shell small, cylindrical, with small, deep, circular umbilicus, 

 the latter 3 or S^ whorls of about equal diameter, those above 

 convexly tapei'ing; white ; surface sculptured with numerous 

 strong but slender longitudinal laminar riblets, curving to the left 

 above, to the right below, and about 27 in number on the last 

 whorl, absent on the apical 1^ whorls. Whorls 6^, slightly con- 

 vex, the last tapering below, obtusely keeled at the base. Aper- 

 ture small, subtriangnlar, wider above; peristome continuous, 

 narrowly reflexed, emarginate at the position of the parietal 

 lamella, the outer lip with a short rounded sinus above; the cavity 

 contracted by an oblique, deeply placed fold on the columella, two 

 nodular teeth upon the outer lip, the upper one submarginal, the 

 lower further within, and a long, high sinuous parietal fold, which 

 runs about one-half of a whorl inward, bending to the left a 

 short distance within. 



Alt. 3.2, greatest diam. 1.5 mm.; length of mouth 0.8 mm. 



