88 CYCLOSTEEMA. 



Faault C rCL OSTBEMA TID^. 



Genus CYCXOSTREMA, Manyan, 1818. 



Section Cycix)STRE3i[a, « .^emu *tndo). 



C. A>rAGLYPrA. A. Ad. PI. 31, figs. 15, 16. 



Turbinate, with broad, flattened umbilicus, last whorl with three 

 spiral, beaded ribs, convex, white, solid, lip externallv cienulated. 



Diam. 4 mill. 



Seto- Uchi, Japaiu 



C. MiCA>.-^. A. Ad. PL 31, figs. 17, 18, 19, 20. 



More depressed than the preceding species, thick, white, last 

 whorl with three spiral nodulous ribs, the middle one more prc»mi- 

 nent, peristome continuous, thick, externally crenulatel. iimbilieus 

 rather small. 



Japan, Sin'rij^H-rt. Au-<rrfilia, 



C. puleheUa, Dunker, (figs« 19, 20) is a synonym. 



C. Calaaleli, Jousseanme. PI. 31, figs. 21, 22. 



Rather widely umbilicated, white, thick, solid, minutely costulate, 

 with an obscure spiral line above, periphery angulated, base with 

 three carina crowing the radiating striae, producing a subnodulous 

 surface. Diam. 2"5 milL 



Prinees Isl. W. Africa. 



C. ^Iakchei, Jou^eaume. PL 31, figs. 23, 24, 25. 



Rather widely umbilicated, white, thick, solid, with spiral rihlets, 

 that in the midtlle of the upper surface tuberculated, riblets closer 

 on the base. Diam. 2'5— 1"5 milL 



Ponhj-Penaiig. Sv.gapore, Yiti Is. 



The larger diameter and last locality are for VitrineUa sculptilis. 

 Garrett (fig. '2o), an undoubted svnonym. the types agreeing com- 

 pletely with Singapore specimens coDected by Archer. 



C. RzEVEAXA, Hinds. PL 31, fig. 26. 



Moderately umbilicated, white, radiately lirate. crossed above 

 by several spiral ridges, of which the centre one is more prominent, 

 fi>rming an angle, ridges close below, spinously tuberculated by the 

 radiating lirte, umbilical wall radiately closely striate. 



Diam. 10 mill. Singapore. 



