566 PROCEEDINGS OF THE ACADEMY OF [DeC, 



Length 42.5, diam. 9 mm. ; whorls 12^. 

 40.0, " 9 '' " 11. 



This Clausiha is surpassed in size only by certain forms of C. mar- 

 tensi. 

 Clausilia japonica kobensis (Smith). 



Clausilia kobensis E. A. Smith, Quart. Journ. of Conch., I, No. 8, p. 122 



(Feb., 1876). 

 Clausilia nipponensis Kobelt, Jahrb. D. M. Ges., Ill, 1876, p. 275, pi. 8, 



figs. 3, 4. 

 Clausilia loxospira Martens in coll., Kobelt, I.e., p. 277. 

 Clausilia japonica var. nipponensis Kob., Bttg. Jahrb. D. M. Ges., V, 1878, 

 p. 50 (ClausiUum). 



In western Hondo there is a rather weakly defined race described 

 as kobensis Smith and nipponensis Kobelt, these two names being 

 synonymous, and based on specimens from Kobe, Setsu. The striation 

 is noticeably finer than in typical C. japonica. The last whorl is fre- 

 quently much compressed, and the preceding whorl bulges, giving 

 a peculiar contour to the shell in dorsal view; but this feature is vari- 

 able. There are always two palatal plicae below the principal one, 

 an upper and a lower. There is often a whorl more than in typical 

 C. japonica. 

 Clausilia japonica vespertina n. subsp. PI. XXX, figs. 11. 12. 



The shell is glossy, chestnut colored, large, swollen in the lower half, 

 attenuated as usual above, finely striate, the striae often split or inter- 

 rupted near the suture; penultimate whorl inflated, the last whorl 

 compressed, tapering downward. The superior lamella is usually 

 small, short, not reaching to the margin of the peristome, and generally 

 separated from the spiral lamella. Palatal phcse two, upper and lower; 

 principal phca usually shorter than in japonica. 



Length 33.0, diam. 7.7 mm.; whorls IH ] „ , . . 

 '' 31.2, " 7.7 '' " lO^jTakuhisan. 



32.2, " 8.2 " " IOHt^i 1- 



" 33.0, " 8.8 " " 11 JTakazakiyama. 



Nishinoshima, Oki, at Takazakiyama (type loc.) and Takuhisan. 

 Types No. 95711 A. N. S P., from No. 1986 of Mr. Hirase's collection. 



This race differs from C. j. interplicata by the absence of inter- 

 mediate palatal plicae between the upper and lower; but it should 

 be noted that some individuals of interplicata from Takeya, Izumo, 

 also lack the intermediate plicae, and then scarcely differ from this 

 insular race from Oki. It is also related to var. kobensis. 

 Clausilia japonica ultima n. subsp. PI. XXX, figs. 8, 9. 



The shell is much more slender and lengthened than C. japonica, 

 chestnut colored, paler just below the suture, verj-- glossy, finely and 



