1902.] NATURAL SCIENCES OF PHILADELPHIA. 381 



Group of C. entospira. 

 Clausilia daemonorum n. sp. Pi. XXI, figa. 70. 71. 



Shell small, fusiform, rather Ihin, finely substriate, the latter part 

 of the last whorl more coarsely so ; glossy. Early whorls lost iu 

 the specimens described; the last whorl is laterally compressed, 

 flattened, the base convex, full and somewhat sack-like. Aperture 

 oblique, irregularly ovate, the peristome continuous, very shortly 

 free above. Superior lamella small, marginal, short, not continuous 

 with the spiral lamella. Inferior lamella receding, becoming very 

 high and approaching the superior lamella in the throat; and 

 within the last whorl it ascends in a broad spiral curve. Subcolu- 

 mellar lamella emerging to the lip-edge. Principal plica rather 

 short. Lunella rather short and arcuate. Clausilium unknown. 



Length of specimen with 4f whorls remaining, 8.2, diam. 2 mm. 



Length of specimen with 4^ whorls remaining, 7.8, diam. 

 2.2 mm. 



Kikaiga-shima, Oshima group. Types No. 82,981, A. N. S. P., 

 from No. 874 of Mr. Hirase's collection. 



A fossil of the laud-shell bed. It has the form, size and surface 

 of a Ziq-)tijx, but is unlike that group in the widely spiral ascent of 

 the inferior lamella within. Whether the species is allied to C. en- 

 tospira, which I have placed in Stereophcedusa, or is an Eupkedusa 

 I am not prepared to say in the absence of the clausilium ; for it 

 has something in common with both groups — the spiral inferior 

 lamella approaching the superior iu the throat, the superior 

 lamella not connected with the spiral, etc. ; but provisionally, and 

 merely to ]mt it somewhere, I refer the species to the group of 

 C. entospira. 



EXPLANATION OF PLATES XVII— XXL 



Plate XVII, Figs. 1, 2.— Clausilia caryostoma MlldtT. Kobe, Sctsii. 



Figs. 3, 4, 5, G. — C. caryostoma var. j((i/i Pils. Jo, Kii. 



Figs. 7, 8, 9, 10, 11.— C. gracicB Pils. Nachi, Kii. 



Figs. 12, 13, 14, 15, 16. — (7. aulacopoma Pils. Hirado, Ilizeu. 



Plate XVIII, Figs. 17, 20, 21, 22.— C. heteroptyx Pils. Type. 

 Tomisato, Kii. 



Fig. 18.— C. heteroptyx Pils. Nachi, Kii. 



Fig. 19. — C. heteroptyx Pils. Tomisato. Kii. 



Figs. 23, 24, 25, 26, 27.— C. sericina var. rliopalia Pils. Mikuriya, 

 Suruga. 



Figs. 28, 29, 80. — C. subulina var. leiicopeas Pils. Ikoma, Kii. 



Figs. 81, 32. — C. subidina var. leucopeas Pils. Saniotonaka-inuia, Kii. 



