370 PROCEEDINGS OF THE ACADEMY OF |~May, 



rior lanielloe are longer, the principal plica longer and stronger, the 

 snbcoluniellar lamella is immersed, and the lunella is strictly lateral. 

 In C. suhignohilis the subcolumellar lamella emei'ges strongly, and 

 the lunella is somewhat doi-so-lateral, Mr. E. R. Sykes, who kindly 

 compared it with the type of his C. ignobilis, now in the British 

 Museum, writes that ignobilis is "a yellower shell with more 

 cylindrical and larger earlier whorls, more like C. ischna and C. 

 iotaptyx." Moreover, if the figure of C. ignobilis is correct, the 

 lunella is lateral, not doi-so-lateral, as it is in subignobilis. 



The three species, C. ignobilis, C. sJiikokuensis and C. sub- 

 ignobilis, agree in the shape of the lunella, and are evidently 

 closely related. 



Clausilia tantilla Pilsbry. PI. XIX, figs. 43, 44. 



These Proceedings for 1901, LIII, p. 655, footnote No. 10 (March 1, 

 1902). 



Shell very small, fusiform, attenuated above, the last three whorls 

 rather large; dull reddish-brown or gray, without cuticle in adult 

 shells; striate, but worn smoothish, the last whorl more coarsely 

 striate behind. Whorls 8J, the first rather large, last compressed. 

 Aperture slightly oblique, trapezoidal-ovate. Peristome reflexed 

 aiid thickened, continuous, very shortly free above. Superior, 

 lamella small, abruptly lower where it joins the low spiral lamella. 

 Inferior lamella receding, vertically ascending within. Sub- 

 columellar lamella usually wholly immersed (but in one specmien of 

 five emerging Aveakly to the lip-edge). Principal plica dorsal 

 and lateral. Upper palatal plica short, a straight oblique, lateral 

 lunella joining it in the middle. No lower palatal plica. 



Length 9.5, diam. 2.5 mm. 



Length 8.3, diam. 2.2 mm. 



Goto, Hizen. Tj^^es No. 83,023, A. N. S. P., from No. 813 

 of Ml'. Hirase's collection. The locality was erroneously given 

 " Goto, Uzen," in a former communication. 



A very small form, differing from other known species of the 

 group of C awajiemis in the straight lunella, which does not 

 curve inward below, and in the diminutive size of the shell. 



Clausilia bigeneris Pilsbrj-. PI. XIX, figs. 37, 38. 



These Proceedings for 1901, LIII, p. 656, footnote No. 12 (Marcli 1, 



Shell fusiform, moderately f-olid, pale reddish-brown, apparently 



