476 PROCEEDINGS OF THE ACADEMY OF [July, 



This insular subspecies has one-half to one whorl more than the 

 typical form from Omi province, although it is much smaller; the 

 spire is somewhat more slender, and the lunella is comparatively 

 degenerate. 



Section HEMIPH^DUSA Bttg. 



Group of C. validiuseula. 

 Clausilia gracilispira Mlldff. PI. XXVII, figs. 27-34. 



Von Mollendorff, Journ. Asiatic Soc.' of Bengal, LI, Pt. 2, No. 1, p. 

 5, PI. 1, fig. 3 (July, 1882); LIV, Pt. 2, No. 1, p. 63 (1885). 



Two specimens labeled as this species were transmitted to me 

 by Mr. E. K.. Sykes. They formed part of Brigade -Surgeon 

 Hungerford's collection, and were taken by him near Kobi, 

 Japan, about twenty years ago. 



One of the specimens is slightly stouter and reddish, 'the other 

 more slender and pale yellowish green. I shall refer to them as 

 the reddish and the green examples. 



The green specimen (PI. XXVII, figs. 27-29) is slender, much 

 attenuated above, and has 9J convex whorls. It is rather strongly, 

 regularly striate. The last whorl is somewhat cylindric, and on 

 its last half the space above the position of the principal plica is 

 distinctly swollen. The aperture is decidedly oblique and ovate; and 

 from its obliquity appears abnormally short in the figures, from 

 being foreshortened. The peristome is rather widely reflexed, 

 shortly free, a little emarginate above, and viewed from the base, 

 it is seen to be distinctly notched to the right of the superior lamella. 

 The superior lamella is marginal and slightly projecting, rather 

 short, and distinctly fiat-topped ; continuous with the spiral lamella. 

 The inferior lamella is very receding, hardly visible in a front 

 view. Within it ascends straightly, is rather stout, and terminates 

 below in a perceptible "knot" or callous thickening. The 

 subcolumellar lamella is very deeply immersed, not visible within 

 the mouth. Both spiral and inferior lamellae ascend to a ventral 

 position, the former being higher in the region where the clausilium 

 lodges. The principal plica is visible within the aperture, and 

 penetrates to a lateral position, being thus fully a half-whorl long. 

 Below it there are four plicae, the upper and lower well devel- 

 oped; two very short, indistinct, minute callous nodules or plicae 

 lying between them. 



