LITTORINID2B. 167 



19.Fossar [Couthonyia] pliciferus. 



Couthouyia plicifera, A. Adams, P. Zool. S. 1863, YobuJco (Japan). 



1 Japan ; ex Mr. Damon [coll. A. Adams]. 



Long. 2, diam. 1 mil. 



20. Fossar [Couthouyia] appressus, n. sp. 



2 Larek and Tumb Island (Persian Gulf) j coll. W. T. Blanford, Esq. 



A most beautiful and distinct form : long. 3, diam. 2 mil. 

 Five whorls, the two nuclear ones smooth, the others minutely 

 reticulate; a very prominent and characteristic raised keel 

 below the suture of the last two whorls ; the shell is unusually 

 thick, the outer margin of the aperture patulously distended 

 and reflected ; the umbilical region widely but shallowly ex- 

 cavated, bordered with a raised keel. 



21. Fossar [Couthouyia] styliferinus, n. sp. 



Three nucleolar apical whorls, smooth and very remarkable, 

 resembling somewhat those of StyUfer ; the other two whorls 

 somewhat distantly spirally striate ; last whorl very large and 

 ventricose in proportion, umbilicus large, well defined. 



Long. 3, diam. 2 mil. 



1 Singapore (type) ; coll. C. J. Irving, Esq. 

 I found this specimen on a sp. of Malleus. 



1 Bombay ; .coll. Rev. S. B. Fairbauk. 



var. [ ? dist. sp]. 

 3 Singapore ; coll. Dr. F. Stoliczka (perhaps not quite adult ?) 



22. Fossar [Couthouyia] solutus, n. sp. 



Five whorls, apical two smooth, the others somewhat coarsely 

 spirally striate ; spire peculiarly attenuately pointed, pyramid- 

 ical [not convex] ; last whorl contracted, thoroughly " solute" 

 below. Long, [vix] 3, diam. [vix] 2 mil. 



1 Gwadar (Persian Gulf) ; coll. W. T. Blanford, Esq. 



