104 



„Long. splra3 O^^^ poU. ; long. tot. 0,o9 poll.; lat. 



0,038 poll-" 



Cerithium latum Ad. Contr. p. 122. 



Hab. Jamaica (Ad.) Guadeloupe (Schramm.) 



250. Bittium (Platygyra?) exile Ad. 



„Sh. conic, turrited, xery slender: broAvnish red, 

 paler at the apex, whitish on the nodules: with one 

 slightly elevated and three well elevated spiral lines, and 

 on each wliorl about twelve rather obtuse ridges, the 

 intersections being moderately developed into nodules; 

 with another spiral Avell elevated line at the periphery 

 of the last whorl: apex very acute: spire with the out- 

 lines rectilinear : whorls twelve to fourteen, quite convex, 

 with a well impreased suture; last whorl terminating 

 abruptly, concave anteriorly : aperture suborbicular : canal 

 extremely short, reduced behind to a broad deep notch." 



Long, spirse Oj^gg poll.; long. tot. 0,j poll.; lat. 



0,04 poU- 



Cerithium exile Ad. Contr. p. 120. 



Hab. Jamaica (Ad.) Guadeloupe (Schramm) St. Thomas? 



(Riise.) 



Cerithiopsis Forh. ^ Hanl. 



251. Cerithiopsis? fusiformis C. B. Ad. 



„Sh. ovate fusiform, reddish black, whitish at the 

 apex, darkest on the ridges, paler between them and 

 anteriorly: with, on most of the whorls, three spiral 

 ridges, of which the upper two are nearer together and 

 in the upper half of the shell are confluent, and of 

 which the one is larger: with numerous scarcely per- 

 ceptible transverse ridgss, wliijh on the spiral ridges 

 are excessively develo[)ed into closely set nodules; ante- 

 riorly with another subnodulous spiral ridge, and with 

 transverse Striae: apex acute: spire with the outlines 

 curvihnear: whorls eight or nine, slightly convex, with 

 an indistinct suture; last whorl much smaller than the 



