370 PROCEEDINGS OF THE ACADEMY OF [May, 



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

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

 In C. subignobilis the subcolumellar lamella emerges strongly, and 

 the lunella is somewhat dorso-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 fiarure of C. ignobilis is correct, the 

 lunella is lateral, not dorso-lateral, as it is in subignobilis. 



The three species, C. ignobilis, C. shikokuensis 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; stria te, 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 

 ffcid 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 specimen of 

 five emerging weakly 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. Types No. 83,023, A. N. S. P., from No. 813 

 of Mr. 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. awajiensis in the straight lunella, which does not 

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



Clausilia bigeneris Pilsbry. PI. XIX, figs. 37, 38. 



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

 1902). 



Shell fusiform, moderately solid, pale reddish-brown, apparently 



