104 



turn proximum vix attigens ; fauce valde contracto ; peristomate 

 rnodice reflexo ; fistula suturali exili valde appressa. Operculum 

 corneum, arete spirale, apice centrali. Axis £ ; diam. £ poll. 

 Inhabits Hong Kong, China. "W". S. 



Ctclotus illotus. T. planorboidea, rudis, rubiginosa, sub- 

 tus late et profundi umbilicata ; anfr. 4 rotundatis, sutura sira- 

 pliei, impressa. Apertura circularis, anfractuni proximum baud 

 amplectens ; labro simplici. Diam. 3 ; axis 1 poll. 



Inhabits Loochoo. W. S. 



In form and general aspect greatly resembling Cycl. suturalis, 

 Sowb., but is smaller, and has a simple suture. 



Cyclostoma barbata. T. parva, ovato-conica, rufo-cornea, 

 litis numerosis volventibus et striis incrementi tenuibus lamellosis 

 decussata, decussationibus barbam gerentibus ; anfr. 5 rotun- 

 datis, sutura canaliculata. Apertura postice subangulata ; peris- 

 tomate simplici, vix expanso ; umbilico modico, profundo. 



Diameters ^ inch. Inhabits Ousima. W. S. 



Two of the ridges on the outer whorl and one on the others are 

 more conspicuous than the rest. 



Cyclostoma citharella. T. parva, subglobosa, tenuis, 

 rufa, laminis incrementi tenuibus ornata, ad peripheriam prope 

 aperturam biangulata, satis umbilicata. Apertura circularis, 

 peristomate simplici anfractum proximum tantum attigente. 

 Operculum subrotundum, paucespiratum, margine attenuato. 



Diameters ^ inch. Inhabits Ousima. 



Were it not for the operculum, it might be mistaken for Helix 

 harpa, Say. 



Cyclostoma musiva. T. ovato-conica, cornea, radiatim rufo- 

 strigata, subtus ad peripheriam rufo-tessellata, modice umbilicata, 

 striis volventibus ad 5 arata, lineis incrementi conspicuis decus r 

 sata; anfr. 5 rotundatis, sutura canaliculata. Apertura rotun- 

 data, peristomate simplici. Axis ^ ; diam. i inch. 



Inhabits — ? (probably Japan). 



The surface is conspicuously and beautifully relieved by the 

 decussating lines. 



