MARGARITA. 279 



Margarita cinerea. 



Shell loAV-conical, tliin, ash colored, uinbilicatcd, with fiMir to six elevated and 

 numerous smaller revolving ridges, and regular, eroded, elevated lines of growth. 



Turbo cinereus, Couthouy, Bost. Journ. Nat. Hist. ii. 99, pi. 3, fig. 9. 



Trochus costalis, Loven, in letters. 



Margarita cinerea, Gould, Inv. 1st ed. 2.i2. — De Kav, N. Y. Mull. 108, pi. 6, fig. 113. 



— Stimpsox, Clieck Lists, 4. 

 ^Liirgarita striata, BuoDERir and Sowekbv. 

 Margarita sordida, IlANt'OCK. 



Shell small, thin, of a low conical or pyramidal shape ; color a 

 dull ashy-white, sometimes tinted with g-recii ; whorls live to seven, 

 convex, and rendered angidar hy prominent, irregidarly 

 dis|)oscd revolving- ridges, of which from four to six arc 

 more elevated, with less conspicuous intervening ones ; and 

 the lowest of these elevated ridges forms a limit, at which 

 the whorl slopes ahruptly, and presents a broad, slightly 

 convex base, marked with line, e(pial, and eipiidistant re- 

 volving lines ; the whole surface is also covered with crowded, very 

 fine, and distinctly prominent lines of growth; the uml)ilicus is broad 

 and deep, and bounded by the last revolving line, which forms an 

 angle terminating at the most anterior point of the otherwise circu- 

 lar aperture, and here causes an angular prolongation ; outer lip 

 regularly curved, sharp, finely scalloped ; it rises on the left margin, 

 and termintites just behind the umbilicus, slightly expanding and 

 partially covering it ; a very thin stratum of enamel sometimes ex- 

 tends across the body of the shell ; throat within with lines corre- 

 sponding to the external marking ; operculum circular, multi-spiral. 

 Height, four fifths of an inch ; base a little less. 



Pound in a very fresh and beautiful condition, but rather rare as 

 yet, ill the stomachs of fishes caught in Massachusetts Bay. Grand 

 Manan to Cape Cod (Stimpson) ; Halifax (Willis) ; N. W. of Green- 

 land (Hai/cs) ; St. Anne, &c. {BeU). 



It is distinguished by the beautiful, sharp lines of groAvth, which 

 are not interrupted by the spiral ridges, and by these ridges cover- 

 ing all the base ; also, by the sliglit ])r()iecting angle of the aper- 

 ture. It is very closely allied to M. striata, Broderip and Sowerby, 

 " Zool. Journ." iv. 371, and figured in Sowerby's " Conch. lUust." 

 (Margarita'), fig. 3. By the kindness of Mr. Sowerby, however, I 

 liave been enabled to compare the two. In BI. striata the whorls 

 are not angulated by the revolving lines, the largest of wdiich are 



