2fi2 MR. E. A. SMITH ON THE [-^P""- '» 



CoLUMBELLA (Mitrella) cribraria, Lamarclc. 



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 stilted. 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 species the following : — Valuta ocellata, 

 Gmeliu ; Buccinum parvulum, Dunker ; Columbella mitriformis, 

 Briiilerip and King ; and C. guttata, Sowerby. 



This ap[)ears to be a species which varies much in size. All the 

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

 eight or 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, fil. xl. figs. 182, 

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



Hab. West Indies {Sowerby), island of St. Vincent, West Indies 

 {Reeve). 



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

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

 and a more distinct sinus above. The apex of this sjiecies 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) sanct^-helen.«. (PI. XXI. fig. 1 2.) 



Tesla fusiformi-ovata , parva, albida, dilute fusco lineata vel 

 maculata, frequenter infra suturam et circa medium avfr. 

 ultimi niveo notata; avfr. 8-i>, primi 3-4 convexi, Iceves, cceteri 

 parum convexi, sfriis spimlibus, suldistantibus inscitlpti, 

 incrementi lineis striati ; anfr. ultimus infra peripheriam 

 rotundatam contractus, oblique tenuiterque sulcatus; apertura 

 angusta, longit. tolius h liaud cequans ; labrum inedioo iter 

 incrassatuin, intus denticulis 7—'S miinitum ; columella callosa, 

 prope medium tuberculo pliciforme instructa; canal is ohliquus, 

 brevis, recurvus. 



Longit. 7g millim., diam. max. 3. 



The spiral subdistant striae will readily distinguish this species 



