1900.] NATURAL SCIENCES OF PHILADELPHIA. 677 



apex oblique, angular at the outer-lower or palato-apical extrem- 

 ity, rounded at the inner-lower or columellar-apical part. 



Alt. 23, diam. 3.0, longest axis of aperture 3.5 mm. 



Ibuki, Omi (Mr. Y. Hirase). 



Remarkable for its mauy-whorled, slender spire, solute aperture 

 and peculiar clausilium. This species is the first one of its kind 

 to be made known, and is one of the most remarkable of Mr. 

 Hirase' s discoveries. 



Section STEREOPH^EDUSA Bttg. 



Clausilia oostoma Molldff. 



C. oostoma Molldff., Journ. Asiat. Soc. Beng., LI. pt. 2, p. 4. PL 1, 



fig. 2(1882). 

 C. jnponica var. surugcs Pils., Proc. Acad. Nat. Sci. Phila.. 1900, p. 



447, PL 14, fig. 4. 



In my former paper on Japanese Clausilias I did not recognize 

 this species in my C. ja})onica var. surugce. I am now satisfied 

 that my variety is identical with the form defined by von Moellen- 

 dorff. 



Clausilia brevior var. addisoni nov. 



Larger than C. brevior, alt. 16-1 8J, diam. 4J- mm., more 

 coarsely striated, especially on the last whorl; three palatal plicae 

 only. This form I at first considered to be the var. tetraptyx 

 Mlldff., having received but one specimen from Mr. Hirase. A 

 large series in the collection of Mr. Addison Gulick shows it to 

 be distinct. It is viviparous. 



Kagashima, Satsuma, in southern Kiusiu (Gulick coll.). 



Clausilia hondana n. sp. PI. XXIV, figs. 13-18. 



Shell rimate, fusiform, dark brown, sculptured with fine but 

 sharp strioe, which are sometimes perceptibly coarser on the back 

 of the last whorl ; apex globose, the first three whorls of about 

 equal diameter, second whorl higher than the third. Whorls 10 \ 

 to 11|-, the last compressed laterall y. Aperture but little oblique, 

 a trifle retracted above and below, pyriform or quadrangular- 

 pyriform, the sinulus high and well defined; peris tome rather 

 widely reflexed, somewhat thickened, continuous, the upper margin 

 shortly free and slightly or not emarginate. Superior lamella 

 sub vertical, compressed, continuous with the spiral lamella. 

 Inferior lamella transversely converging to the other, strongly 

 44 



