1902.] NATURAL SCIENCES OP PHILADELPHIA. 377 



Kashima, an island near Tanabe, Kii. No. 82,459, A. N. S. 

 P., from No. 782 of Mr. Hirase's collection. 



As in other Tyrannophcedusce of the typical group, there is a slight 

 depression behind the outer and basal lips. It is more slender 

 above and more swollen below than C. orthalracta Pils. 



Further study of Adams' description convinces me that the form 

 I named C. aurantiaca var. hypoptychia can be nothing else than 

 C. plicilabris A. Ad., described from Tanabe, Kii, the descrip- 

 tion of which, so far as it goes, agrees exactly with the shells sent 

 by Mr. Hirase. By ' ' lunella inconspicua ' ' Adams merely meant 

 that it was not visible through the shell. 



The degree of plication of the subcolumellar region varies within 

 wide limits, as I have shown to be the case in several other species 

 of Tyrannophcedusa. 



I do not give the name plicilabris precedence over aurantiaca, 

 because the description published by Adams was not sufficient for 

 the recognition of the species until specimens from the type locality 

 came to hand. 



One specimen which was sent with v. plicilabris (PL XX, figs. 

 64, 65) is much larger than the others, measuring, length 19, 

 diam. 3.8 mm. It is densely and sharply striate, and has 13 

 whorls. This may perhaps prove, when more material is received, 

 to be a distinct species. It is No. 83,134, A. N. S. P. 



Group of C. bilabrata. 



Clausilia dalli Pilsbry. PI. XXI, figs. 75, 76, 77. 



Tnese Proceedings for 1901, LIII. p. 656, footnote No. 13 (March 1, 

 1902). 



Shell many whorled, awl-shaped, the upper half much attenuated, 

 lower half obese, pale brown, rather thin, scarcely glossy, all the 

 specimens having the cuticle slightly worn below, wanting above; 

 finely striate, more coarsely so on the back of the last whorl. 

 Whorls 14 J to 15J, moderately convex, the first whorl rather 

 globose, next 5 or 6 whorls scarcely increasing in diameter, those 

 following enlarging slowly, the last three whorls forming about 

 half the length of the shell, the penultimate whorl widest, last 

 whorl narrower, compressed. Aperture trapezoidal -ovate, slightly 

 oblique. Peristome continuous, thickened and reflexed, white, the 

 right margin crossed by a single fold (the subcolumellar, fig. 76) 



