134 CONCHOLOGY. 



FAMILY XX. 



CoLUMELLARiA. Five genera. 



1. Genus Colnmbella. PI. XIL 

 .hiimal. Imperfectly known ; eyes placed ruuch below the 

 middle of the tentacula. 



Shell. Thick, turbinated, with a short obtuse spire ; aperture 

 narrow, elongated and terminated by a very short canal, narrowed 

 by an inflation at the inner side of the right edge, and by some 

 folds on the columella; a very small horny operculum. Inhabits 

 the Indian ocean. Eighteen species. 



Columbella rustica. Columbella pardalina. 



C. Hebraea. . C. ovulata. 



C. semipunctata. C. zonalis. 



C. reticulata. C. mendicaria. 



C. strombiformis. C. punctata. 



C mercatoria. C. scripta. 



C. flavida. C. nitida. 



C. bizonalis. C. fulgurans. 



C. turturina. C. unifascialis. 



2. Genus Mitra. PI. XII. 

 AiUmal. Entirely unknown. 



Shell. Turriculated, subfusiform and oval ; spire always 

 pointed at the summit ; aperture small, triangular, widest anteri- 

 orly where it is strongly emarginated ; external edge trenchant, 

 nearly straight, always longer than the columella, which is formed 

 by a very thin callosity, and marked with oblique parallel folds, 

 the anterior of which are the shortest; no operculum. Inhabits 

 the Chinese seas. Eighty species. 



Mitra papalis. Mitra crocata. 



M. puncticulata. M. nexilis. 



M. cardinalis. M. scabrinscrula. 



M. versicolor. M. crenifera. 



