195 



V. carneolata, 

 ' Guinaica, 

 ' laevigata, 

 ' polyzonalis, 

 ' fulva, 

 ' sulcata, 



nodulosa, 



magnifica, 



ancilla, 



Magellanica, 



Pacifica, 



Marginella. Shell ovate oblong, 

 nally thickened; base of the aperture 

 umella nearly equal. 



M. glabella, 



' radiata, 



1 nubeculata, 



' coerulescens, 



' quinqueplicata, 



' limbata, 



• rosea, 



M. 



bifasciata, 



fab a, 



aurantia, 



bivaricosa, 



longivaricosa, 



muscaria, 



formicula, 



V. fulminata, 

 ' Junonia, 

 ' undulata, 

 ' lapponica, 

 ' vexillum, 



V. volvacea, 



' festiva, 

 ' mitraeformis, 

 ' nucleus, 

 18 fossil species. 



smooth, spire short, right lip exter- 

 scarcely notched; plaits on the col- 



M. eburnea, 



' dentifera, 



' dactylus, 



' bullata, 



' cornea, 



' abellana, 



' goodalli, 



M. persicula, 

 ' lineata, 

 ' tessellata, 

 ' interrupata, 

 ' marginata, 



1 fossil species. 



Volvaria. Shell cylindrical, convolute; spire scarcely projecting; aper- 

 ture narrow, the length of the shell. One or more folds on the lower part of 

 the columella. 



V. monilis, 



' pallida, 



V. triticea, 

 ' oryza, 



V. miliacea, 



1 fossil species. 



CONVOLUTA.— Six Genera. 



Shell without a canal, but having the base of the aperture channelled or ef- 

 fuse; the whorls large, compressed, convolute, the last nearly covering the 

 whole of the others. 



OvUla. Shell turgid, attenuated at each end, the margins turned upwards; 

 aperture longitudinal, narrow, effuse at the extremities; without teeth on the 

 left lip. 



O. 



ovum, 



margarita, 



Adriaticum, 



pyriforme, 



carneum, 



marginatum, 



lacteum, 



breve, 



O. 



verrucosum, 



angulosum, 



triticeum, 



frumentum, 



stritulum, 



emarginatum, 



gibbosum, 



obtusum, 



O. seminulum, 



' formicarium, 



' secale, 



' spelta, 



' intermedium, 



' birostre, 



1 longirostratum, 



' volva, 



O. aciculare, 



' patulum, 



' hordeaceum, 



' rufum, 



' avena, 



1 inflexum, 



' aequale, 

 2 fossil species. 



Cypr.ea. Shell oval or ovate oblong, convex; the lips curved inwards; 



