CAECUM. 223 



C. CORNUCOPIA, Carpenter. PI. 67, fig. 75. 



Like the preceding, but smaller and less inflated, being sub- 

 cylindrical ; mucro very acute. Length, '064-'09 inch. 



West Indies, in sponge of commerce. 



C. COBNUBOVIS, Carpenter. PI. 67, fig. 74. 



Shell like the preceding, but the septum subangulate, with 

 narrow, submucronate apex; operculum about 12-whorled, with 

 an exterior strong spiral lamina. Length, '067-'082 inch. 



West Indies. 



Unfigured Species. 



C. SUBINFLEXUM (Bahamas), C. FJSCHERI and C. miKLis (Vera 

 Cruz and Carmen), C. CUBITATUM, C. TENERUM, C. Coxi, 

 C. UNDULOSUM, C. CROSSEI, C. DESHAYESII, C. MORELETI, C. 

 BITUMIDUM, C. CARPENTERI and C. TUMIDISSIMUM, all of de 

 Folin. 



Subgcnus STREBLOCERAS, Carpenter, 1858. 



C. SUBANNULATUM, de Folin. Honolulu. 



This is the only recent species of the group, and it is unfigured. 



Subgenus WATSONIA, de Folin, 1879. 



C. ELEGANS, de Folin. Cape York, Australia. 



The only species, and unfigured. 



Subgenus PARASTROPHIA, de Folin, 1869. 



C. FOLINI, Bucq. Dautz. et Dollf. PI. 67, fig. 81. 



Shell elongated, rather narrow, thin, subopaque, white ; 

 nucleus smooth, oblique, afterwards finely annulated, the annu- 

 lations microscopically decussated. Length, *085 inch. 



Mediterranean. 



Spirolidium Mediterraneum, Costa, is identified with this 

 species by Monterosato. 



Undetermined Species. 



C. ASTURIANA, de Folin. Atlantic Coast of Spain. 



C. CHALLENGERI, de Foliu. Cape York, Australia. 



