which inhabit the West Indian Seas. 248 



1. Lucina Americana. Nov. sp. 



L. t. Lucinoi divaricaioi simili; crassiore, majore; striispro- 

 fundioribus ornata ; lunula minima, elongata, sinuosa ; margini- 

 bus exilissime crenulatis, baud serratis. Long. 19.8 millim. ; 

 alt. 19.6 millim. ; lat. 12.7 millim. 



We wisb to call tbe attention of geologists and of otbers, who 

 bave believed in tbe great geological antiquity and tbe wide 

 geograpliical distribution of tbe so-called L. divaricata, to tbe 

 just remark of Pbilippi (Zeit. f Mai. 1848. p. 151): "nomine 

 L. divaricata3 plures species confuso3, omnes divaricatim striata?." 

 Wben tbe types sball bave been properly distinguisbed, we 

 believe tbey will be found to bave tbe ordinary restriction botb 

 in time and in area. Tbe Linnaean name sbould be reserved 

 for tbe Mediterranean species, since Linna3us assigns bis sbell to 

 a Mediterranean babitat. 



L. eburnea Rv., from tbe west coast of tropical America, 

 resembles tbis species more closely tban does any otber Atlantic 

 species, but differs in baving a more distinct and cordate lunule, 

 and in baving tbe striae more arcuated. Tbe beaks of our sbell 

 are not oblique as in L. ornata Rv. 



Habitat. — Coney Is., New York ; C. B. A. ! and Jamaica ; 

 C. B. A. ! St. Tbomas ; T. H. Newton ! in Mus. Amb. 



2. Lucina Anatellinoid«S Reeve, Conch. Icon. 

 " Habitat— West Indies ;" Reeve. 



3. Lucina Antillarum Reeve, Conch. Icon. Aug. 1850. 



Tbis species was described by me, under tbe name of L. 

 ornata, in a paper read before tbe Bost. Soc. Nat. Hist. May 5, 

 1847. Tbis name occurs in tbe published record (Proc. vol. ii. 

 p. 228), but tbe description of tbis and of several otber species 

 appears to bave been overlooked in publication. Tbe species 

 was also included, witb tbe same name, in my Catalogue of 

 Nortb American SbeUs, Jan. 1, 1847. Subsequently Mr. Reeve 

 bas given tbe same name to anotber species ; but botb of Mr. 

 R's names must stand. 



