2fi2 MR. E. A. SMIIH ON THE E^^P''- '> 



CoLUMBELLA (Mitrella) cribraria, Lamarck. 



This species has a very remarkable distribution. Java Seas, 

 Ascension Island, St. Helena, Goree, Guinea, Cuba, Barbadoes, 

 Panama, and Mazatlan have been ascribed to it ; and the British 

 Museum, besides specimens from Goree, St. Helena, Ascension, 

 Panama, and Mazatlan, contains series from St. Vincent's, West 

 Indies, Guatemala, and Amboyna. Those from Guatemala were 

 described by Reeve under the name of C. delicata (Conch. Icon, 

 pi. xxvii. fig. 171), but whether from the eastern or the Pacific coast 

 is not stated. The series from Amboyna have that locality attached 

 to them, but I am unable to discover the source whence they were 

 obtained, and therefore cannot vouch for the correctness of the habitat. 

 Dr. P. P. Carpenter, in his Catalogue of Mazatlan Shells, cites among 

 the synonymy of this sj)ecies the following : — Foltita ocellata, 

 Gmelin ; Buccinnm parvulum, Dunker ; Columbella mitriformis, 

 Broderip and King ; and 0. guttata, Sowerby. 



This appears to be a species which varies much in size. All the 

 specimens from Ascension and St. Helena are small, averaging about 

 eight ur nine millimetres in length. They are almost invariably 

 decollated, and have but four whorls remaining. The largest specimen 

 from St. Vincent's, consisting of an equal number of whorls, is 12 

 millimetres long. The specimens from Goree, Amboyna, and Panama 

 are, as a rule, broader, larger, and more solid than West-Indian or 

 St. Helena examples. 



Columbella (Mitrella) pusilla, Sowerby. 



Col. pusilla, Sowerby, Thes. Conch, vol. i. p. 144, pi. xl. figs. 182, 

 183 ; Beeve, Conch. Icon. pi. xx. figs. 109, 110, 112. 



Hub. West Indies (Sowerby), island of St. Vincent, West Indies 

 (Reeve). 



This species closely resembles C. lunata. Say, but is a trifle more 

 slender, marked somewhat differently, has a more thickened labrutn, 

 and a more distinct sinus above. The apex of this species is invar- 

 iably brown, and the lip, especially the sinus, is usually tinted with 

 the same colour along the edge. The single specimen from St. Helena 

 was collected by J. Macgillivray. 



Columbella (Mitrella) sanctjE-helen^. (PI. XXI. fig. 12.) 



■ Testa fusiform i-ovata , parva, albida, dilute fusco lineata vel 

 maculata, frequenter infra suturam et circa medium anfr. 

 ultimi niveo notata; anfr. &-[}, primi 3-4 convexi, Iceves, cceteri 

 parum convexi, sfriis spiralibiis, subdistantibus insculpti, 

 incrementi lineis striati ; anfr. ultimus infra peripheriam 

 rotiindatam contractus, oblique tenuiterque sulcatus; apertura 

 angusta, lonyit. tolius 5 haud cequans ; labrum mediocr iter 

 incrassatum, intus denticulisl—'S muniturn ; columella callosa, 

 prope medium tuberculo pliciforme instructa ; canulis ohliquus, 

 brevis, recurvus. 



Long it. 7 2 millim., diam. max. 3. 



The spiral subdistant striee will readily distinguish this species 



