434 



TTlOCHIXiE. 



multilineata, De Kay. 

 obscura, Couth.. 

 ornata, Be Kay. 

 Persica, Gould. 

 polytropa, A. Adams. 

 papilla, Gould. 

 purpurata, Forbes. 

 striata, Leach. 



sulcata, Soiv. 

 tessellata, A. Adams. 

 umbilicalis, Brod. and Sow. 

 undulata, Moll. 

 Vahlii, Moll. 

 variabilis, A. Adams. 

 venusta, Phil. 



Genus VITRINELLA, C. B. Adams. 



Shell tuvbiniform, vitreous, minute, vpitli a large, orbi- 

 cular aperture ; either umbilicated, or with the umbilical 

 region deeply and widely indented. 



Ea;. V. valvatoides, C. B. Adams, pi. 49, fig. 7. 



This genus comprises a group of small, transparent 

 shells having large apertures, and rapidly-enlarging 

 whorls; it consists of numerous species. "They are not 

 the young of any other species, for the first one, or one 

 and a half, whorls are distinguished from the following 

 whorls by nuclear peculiarities, as want of sculpture, &c. 

 We are acquainted with the young of all the larger species 

 which inhabit the same localities, and none of them re- 

 semble these shells." (C B. Adams.) 



Sj^ecies of Vitrinella. 



anomala, D'Orh. (Rotella). 

 concinna, C. B. Adams. 

 exigua, C. B. Adams. 

 helicoidea, C. B. Adams. 

 hyalina, C. B. Adams. 

 interrupta, C. B. Adams. 

 Janus, C. B. Adams. 

 megastoma, C. B. Adams. 



minuta, C. B. Adams. 

 moclesta, G. B. Adams. 

 Pauamensis, C. B. Adams. 

 parva, C. B. Adams. 

 perparva, C. B. Adams. 

 pusilla, Pfeiff. (Rotella). 

 regularis, C. B. Adams. 

 seminuda, C. B. Adams. 



