220 CAECUM. 



Section III. Costulata. 



C. CLAVA, de Folin. PL 67, fig. 86. 



Shining, with subacutely rounded longitudinal costulations, 

 becoming stronger towards the aperture, and evanescent annular 

 striae, inflated towards the aperture, aperture contracted, nar- 

 rowly margined, septum mucronate, prominent, apex obtuse. 



Length, '08 inch. 



Guadeloupe , W. I. 

 C. BREVE, de Folin. PL 67, fig. 88. 



Very short, cylindrical, slightly bent, subpellucid, white, with 

 fine longitudinal line, and equal interspaces and a few annular 

 striae towards the aperture, aperture encircled 03^ a tumid rib, 

 not contracted ; septum mamillate, subungulate, with dextral 

 apex. Length, *05 inch. 



Jamaica. 



Undetermined Species. 



C. SUBSPIRALE, ABNORMALE, TNSCULPTUM, OBTUSUM, Carpenter. 



Mazatlan. 



C. PLICATUM, Carpenter, W. Indies. 



C. POLLTCARE, Carpenter. Teneriffe. 



C. LAQUEATUM, C. B. Ad. Panama. 



C. SEMITRACHEA, Brusina. Mediterranean. 



C. CRYSTALLINUM (Honolulu), C. STRIATUM, C. MIRABfLE, Folin. 



Section IV. Quadrilata. 



C. ANNULATUM, Brown. PL 67, fig. 76. 



Elongated, solid, with 20-30 rounded annulations, larger and 

 more distant towards the mouth, and rather close longitudinal 

 lirse, septum with a dextral finger-like mucro. Young shell with 

 more acute annulations, the longitudinal sculpture obsolete. 



Length, '122 inch. 



Europe, West Indies, Aden. 



The more characteristic name of reticulatum was given to the 

 adolescent form by Brown. It is Orthocera trachea of Fleming. 



C. INSTGNE, Folin. PL 67, fig. 87. 



Elongated, subdiaphanous, shining, brownish, with wide flatly 

 rounded annulations and narrow interstices, longitudinally striate 



