218 (LECUM. 



Var. SEARLES-WOODII, Carp. 



Rings closer (about 24 in the young shell), scarcely sharp and 

 often obsolete, growth scarcely tapering, very slender, septum 

 ungulate, turned somewhat to the right. 



C. UNDATUM, Carp. PI. 67, fig. 70. 



Short, obese, young shell smooth, adult with 10-15 acute 

 annulations and undulating concave interstices, contracted at 

 each extremity, septum ungulate, with prominent, acute, elon- 

 gate apex; operculum concave, with about 15 whorls. 



Panama to Mazatlan. 



The adolescent stage is C. parvum, C. B. Ad. Folin has 

 described Vars. contraria and cornea. 



C. RYSSOTITUM, Folin. PI. 66, fig. 64. 



White, very shining, transversely obsoletely annulated, be- 

 coming more distinct on the concave side near the aperture, 

 aperture oblique, much contracted above, septum submamillate, 

 submucronate. Operculum ? Length, -09 inch. 



Went Indies, Venezuela, Brazil. 



C. PARAUOXUM, Folin. PI. 67, fig. 78. 



Shell arcuate, subtranslucent, yellowish white, gra}ash or 

 corneous, smooth, with three prominent distant rounded annu- 

 lations near the apex, and wider interspaces, septum large, with 

 bead-like projection. Length, *066 inch. 



Pearl Islands, Panama. 



C. SUBANNULATUM. de Folin. PL 67, fig. 72. 



Hyaline, slightly arcuated, very finely numerously annulated, 

 the septum convex, hardly projecting, aperture encircled b} r a 

 prominent rib. Length, -066 inch. 



Mediterranean and Adriatic Seas. 



C. CREBRICINCTUM, Carp. PI. 67, fig. 71. 



Rather large, solid, reddish brown, with darker longitudinal 

 rays, often obsolete, with about 80 close, rounded, low annula- 

 tions, without interstices ; septum subungulate, submucrouate. 



Length, '14 inch. 



Monterey, San Diego and Sta. Barbara, Cal. 



