LITTORINIDE. 167 
19. Fossar (Couthonyia] pliciferus. 
Couthouyia plicifera, 4. Adams, P. Zool. 8. 1863, Yobuko (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) ; 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, u. sp. 
Three nucleolar apical whorls, smooth and very remarkable, 
resembling somewhat those of Stylifer; 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. 8, B. Fairbank. 
var. [ P 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. 
