140 CERITHIUM. 



C. TROCHIFORME, Sowb. PL 26, fig. 95. 



Trochiform, longitudinally plaited, tuberculated by the crossing 

 of spiral sculpture, last whorl rather flat below, and less sculptured ; 

 chocolate color. Length, 3 mill. 



California. 



A juvenile, which I am unable to refer definitely to any form 

 known to me. The locality needs confirmation. 



C. FERRUGINEUM, Say. PL 26, figs. 99-5. 



Orange-red to chocolate color, sometimes whitish on the lower half 

 of the body whorl, sometimes variegated, with small, oblique, 

 rounded ribs, cut into numerous tubercles by spiral grooves, lower 

 half of body whorl less distinctly tuberculated, whorls occasionally 

 varicose. Length, 12-15 mill. 



So. Carolina to Florida ; West Indies. 



Var. VERSICOLOR, C. B. Adams. Figs, 100-5. 



The AVest Indian examples of C. ferrugineum have received this 

 name : they usually vary from the type in being parti-colored as 

 above, and a little stouter in form. These differences are not very 

 constant, C. Eriense, Val. (fig. 1), of \vhich the figures in Reeve 

 and Sowerby (copied by me) appear to be magnified representations, 

 and which Morch calls var. major, may be here referred, as well as 

 C. stercus-muscarum, Kiener, C. variabile, C. B. Ads. (fig. 2) = var. 

 grisea, Morch, C. nigrum, Phil., C. Bermudce, Sowb. (fig. 4), C. 

 Thomasice, Sowb., C. lutosum, Menke (fig. 5). 



C. RISSOID^, Sowb. PI. 26, fig. 6. 



Small, whitish, spirally striated, longitudinally plaited, with small 

 tubercles in three rows on the spire whorls, suture deep, last whorl 

 alternately ridged beneath. Length, 7 mill. 



Ins. St. Thomas, W. I. 



A much smaller species than the foregoing, always white, or yel- 

 lowish white. 



C. SAGRJE, d'Orb. PL 26, fig. 94. 



Ovately ventricose, beaded in three spiral series on the upper 

 whorls, more numerously on the lower one, the row immediately 

 below the suture more prominent ; w r hitish, longitudinally irregularly 

 stained with chestnut. Length, 9 mill. 



Cuba. 



C. megasoma, C. B. Ad., is a synonym. Morch mentions a var. 

 pallida. 



