164 Description of some 



still thinner and lighter shell than the M. flarida, of a deeper yel-- 

 low, and has the outer margin of its lip stained with orange-red. 

 Some eonchologists have referred the shell before us to the J\I. api- 

 ci/ta, Menkc, (Synopsis meth. mollusc.) Menke's description, how- 

 ever, which is accompanied hy no figure, is so short and indefinite 

 as to apply equally well to two or three species, and on reference 

 to specimens of M. apicina, in the cabinet of Dr. Jay, received by 

 him from Europe under that name, they proved to be well charac- 

 terized specimens of M. conoid alis, Kiener, possessing the dots up- 

 on the outer lip peculiar to that species. Hinds, (Proc. Zool. Soc. 

 April, 1844,) has described a MargineUa Jidda from Cuba, which 

 is evidently related to this group, and may perhaps be identical 

 with M. conoidalis. 



Marginella obesa. Plate X. fig. 5, a. b. — Cabinet of the Lyceum 



Testa ovata, tumida, leevissima, albido-lutesente, lineis trans- 

 versis confer! issimis interruptis fuscis aut nigris, in llammulis un- 

 dulatis longitudinalibus dispositis ; spira obtecta, maculis fuscis 

 circumdata : labro intus obsolete crenulato, extus scope nigro 

 maculato ; columella sex vel octo-plirata ; plicis quatuor inferiori- 

 bus distinctis obliquis ; alteris superioribufl obsoletis transversis. 



Shell ovate, tumid, highly polished; color yellowish-white with 

 crowded transverse interrupted lines of dark brown, which are in- 

 clined tobe grouped in Longitudinal undulations. A vitreous enam- 

 el conis the whole shell, so as slightly lo obscure the markings. 



Bpire, which would he nearly concealed by the last u horl, is en- 

 i . covered by thi enamel, and is surrounded by five or sis dark 

 I.: iwn speckles. The lip is obsoletely toothed within; without, ii 

 is not distinctly margined, is m ire of ;i yellowish cast than the resl 

 of the shell, and usually ba from one to three black spots or ir- 

 i lar blotches. The columella baa from .-i\ to eighl folds; the 

 uppermost three or four are verj Bmall, while the lowest but one is 



, slightly bifid within, and extends outwardly into an elevated 



