c^cuM. 221 



over the annulations ; aperture oblique, margined by a rib ; 

 septum mucronate, mucro dextral, sharp pointed. 

 Length, '125 inch. 



Jamaica. 

 C. C0R0NATUM,.rolin. PI. G7, fig. 80. 



Yellowish gra3^, with wide, flatly rounded annulations and 

 minute interstices, decussated by prominent, distant rounded 

 longitudinal costae, with rather wide interstices, aperture bordered 

 b}^ a tubercular rib ; septum mucronate, mucro dextral, sharp 

 pointed. Length, -08 inch. 



Jamaica. 

 C. IRREGLLARE, Folin. PI. 67, fig. 82. 



Yellowish or grayish, with wide flattened annulations, becom- 

 ing higher and more convex towards the aperture, interstices 

 narrow, and longitudinally striate ; septum mucronate, the mucro 

 dextral, finger-like. Length, '16 inch. 



Bahia, Brazil. 

 C. PHRONiUM, Folin. PI. 6T, fig. 79. 



Shell well-curved, with numerous rounded annulations, and 

 narrow interstices, decussated by longitudinal distant narrow 

 sulci; mucro spinose. Length, -IS inch. 



Haiti. 

 C. CooPERT, Smith. PI. 67, figs. 84, 85. 



Shell with about 24, somewhat rounded longitudinal ri])s, 

 crossed by numerous annulations, which are less marked towards 

 the middle, white ; septum mucronate, with the apex inclining to 

 the left, when looking at the back of the shell ; operculum con- 

 cave. Length, "13 inch. 



New England^ Long Island Sound. 



Because of G. Cooperi, Carpenter, Dr. Cooper changed the 

 name of this species to C. Smithii and Prof. Verrill to C. cosfa- 

 tum, but as Smith's species was published before Carpenter's, 

 both these names fall into the synonymy. It is a pity that such 

 a little shell should be burthened with such a large S3-nonym3' — 

 and for which there is no excuse. The desire to rush into print 

 is so overmastering that no one is deterred by such a slight 

 obstacle as being unable to refer to the literature of his subject. 

 The figure given by Yerrill represents the adolescent stage of 

 sculpture, with less numerous ribs (fig. 85). 



