24 Cincinnati Society of Natural History. 



Remarks : This species appears to be quite distinct from Paludomus 

 crassus V. dem Bush. Prof. A. Brot, who suggested the specific name 

 given, writes as follows : " It is not unlike P. conicus, Gray, (of which 

 P. crassus is generally considered a variety, perhaps erroneously) but 

 your specimens present a character quite unusual in the whole genus; 

 the columellar margin is bordered by a semi-lunar flattened area, which 

 fills the umbilical region, and is distinctly delimited by an acute 

 ridge.''' Twenty specimens received. 



6. Nanina brookei, Adams & Reeve. 

 Three magnificent examples of this species received. The largest 

 3J/£ inches in diameter. 



7. Nanina decrespignyi, Higgins. 



One specimen. 



8. Nanina mindaiensis, Bock. 



Six specimens received. This form shows but six whorls. There 

 are several similar forms like N. janus, Chemn., N hugonis, Pfr. , 

 and N. amphidroma, V. Martens, that may prove to be all one species. 



9. Nanina densa, Ad. & Rve. 



Six specimens. The darker colored ones equal N Schumacher- 



iana, Pfr. 



10. Nanina ag/aja, Pfr. 



One specimen, close to A r . jitcunda, Pfr. 



11. Trochomorpha angulata, Issel. 



Three specimens. 



12. Trochomorpha kusana, n. sp. PI. III., figs. 3, 3a, 3b. 



Shell minutely perforate, thin, subtrochifonn, light horn color, 

 translucid, with about three transverse raised striae parallel to the 

 suture : whorls six, strongly rounded, the body whorl non-descending ; 

 spire obtuse; base rounded; aperture flattened, ovate, the transverse 

 diameter the largest, peristome acute ; columella reflexed at base and 

 partially covering the umbilicus. Diameter, 3 mm. Altitude 2 mm. 



Remarks : Seven specimens received. They differ in size and 

 shape from T. angulata, Issel; both species, however, could just as 

 well be placed with the section Sitala of the genus Nanina. 



13. Nanina {Microcystis) macdougalli ? Issel. 

 Twenty specimens, which agree with the description of the above 

 species better than any other. 



