2 Descriptions of New Species of Marginella, Sfc. 



species, belongs to the collection of Greo. A. Perkins, M.D., now 

 of Salem, Mass., formerly missionary at C. Palmas, by whose 

 kindness I have been permitted to describe it. Although in 

 tolerably good condition, it has probably lost the original 

 brightness of its enamel. In size and form it closely ap- 

 proaches M. Belcher i Hinds, and even in the style of mark- 

 ing, it somewhat resembles some varieties of that species, but 

 is at once distinguished by its greatly thickened, denticulate 

 and dotted lip. In its thickened lip and ventral callosity it 

 is allied to M. Petitii Duval, but is much smaller, and quite 

 differently marked. 



MARGINELLA amabilis. 



M. carnea (in part) Sowb. Thes. Conch., p. 398, pi. 76, f. 102, 114, 

 (not of Storer.) 



In Annals of Lye. Nat. Hist,, vol. 4, p. 495, I expressed a 

 doubt whether the figures above cited were truly referable to 

 M. t carnea Storer. I have since become convinced that they 

 are not. Fig. 103 of the same plate in the Thesaurus truly re- 

 presents Storer's shell, but Sowerby erroneously regarded that 

 figure as a variety, and not as the typical form, and hence his 

 description, which is well worded, applies not to the true M. 

 carnea, but to the form which we now separate under the 

 above name. The M. amabilis is larger and more elongate 

 than M. carnea, and the rich flesh-colored tinge which the 

 back of the shell exhibits, is arranged in three bands in the 

 former, while in the latter only two are evident. The junc- 

 tion of the spire and lip is less shouldered in M. amabilis, and 

 the lip is usually marked by two brown spots. In short, it 

 is as closely related on the one hand to M. oblonga Swains. 

 as it is to M. carnea Storer ^ on the other, and has near affini- 

 ties also to M. guttata Dill. 



Length, 0.75 inch, (20 millim.) Breadth, 0.46 inch, (12 



