172 



AMERICAN JOURNAL 



RECTIFICATION OF THE SYNONYMY OF CERTAIN 

 SPECIES OF MARGINELLA. 



BY JOHN H. REDFIELD. 



In Vol. V. of this Journal, p. 91, I referred to a species of 

 Marginella figured by Reeve for M. maculosa^ Kiener, but which 

 I regarded as distinct from Kiener's species, though I was not 

 then prepared to name it, for want of an acquaintance with the 

 shell itself. Among some shells recently sent me for inspection 

 by Governor Rawson of Barbadoes, was a Marginella from the 

 Grenadines, which I at once recognized as the shell figured by 

 Reeve as M. maculosa, Kiener, and by Sowerby as M. guttata. 

 Swains., but which I am convinced should not be confounded 

 with either. For this species I now propose the name of 3Iar- 

 gmella calculus. In the paper above quoted, I have already at- 

 tempted to correct the perplexed synonymy of some allied species, 

 but I am now enabled more satisfactorily to elucidate the four 

 species to which the name of guttata has been by turns applied — 

 a name which must be retained for only the first of those which 

 follow : 



1. M. GUTTATA, Dillwyn, Descript. Catal. p. 526, 1817. 



M. longivaricosa, Lam., Kiener, Sowb. in Thesaurus. 



Ilab. Caribbean Province, Honduras to Tortola. 



This well known species was first pointed out by Sloane in 

 his history of Jamaica. 



2. M. PHRYGIA, Sowb. 



31. guttata, Swains., Zool. Illust. 2d ser. i, pi. 44, f. 3, 1829- 

 31. phryqia, Sowb., Thes. Conch, i, 394, pi. 78, f. 218, 219, 

 1-846. 



31. Swainsoniana, Petit, Cat. in Journ. de Conch, ii, 55, 1851. 

 31. phrygia, Reeve, Conch. Icon. pi. 15, f. 67, 1865. 



Hah. Gulf of California, Reeve. I have received it from 

 Acapulco, collected by Sloat. Swainson and Sowerby were unac- 

 quainted with its habitat. Not common in collections. 



