144 CONCHOLOGY. 
. 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 and American seas. ‘Twenty species. 
Columbella rustica. Columbrella pardalina. 
C. Hebrea. 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. unifascia lis. 
C. labiosa.* C. avara,* 
2. Genus Mitra. Pl. XII. 
Animal. 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. 
M. pedicula. M. teniata. 
M. cornicularis. M. corrugata. 
M. striatula. M. lyrata. 
M. cornea. M. cinctella. 
M. melaniana. M. Caffra. 
M. episcopalis. M. stigmataria. 
M. pontificalis. M. fissurata. 
