164 Description of some 



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

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

 Some conchologists have referred the shell before us to the M. api- 

 cina, Menke, (Synopsis meth. mollusc.) Menkc's description, how- 

 ever, which is accompanied by 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. conoidalis, Kiener, possessing the dots up- 

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

 April, 1844,) has described a Marginalia livida from Cuba, which 

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

 with M. conoidalis. 



Maroinella obesa. Plate X. fig. 5,a.l>.~ Cabinet of Ike Lyceum. 



Testa, ovata, tumida-, loevissim&, albido-lutesente, lineis trans- 

 versis confertissimis interrupts fuscis aut nigris, in flammulis un- 

 dulatis longitudinalibus disposals-; spir& obtecta, maculis fuscis 

 circumdata : labro intus obsolete crenulato, extus scepe nigro 

 maculato; columella sex vol octo-plicatA ; plicis quatuor inferiori- 

 bus distinctis obliquis j alteris superioribus obsoletis transversis. 



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

 crowded transverse interrupted linesof dark brown, which are in- 

 clined to be grouped in longitudinal undulations. A vitreous enam- 

 el coats the whole shell, so as slightly to obscure the markings. 

 The spire, which would be nearly concealed by the last whorl, is en- 

 tirely covered by this enamel, and is surrounded by five or six dark 

 brown speckles. The lip is obsoletely toothed within; without, it 

 is not distinctly»margjned, is more of a yellowish cast than the rest 

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

 regular blotches. The columella has from six to eight folds ; the 

 uppermost three or four are very small, while the lowest but one is 

 large, slightly bifid within, and extends outwardly into an elevated 



