CONCHOLOGY. 1438 
orly ; the right margin entire ; columella callous posteriorly, um- 
bilicated, and subcanaliculated at its left side; an operculum. 
Found in the Indian and South American seas. Five species. 
Eburna glabrata. Eburna spriata. 
E. Ceylonica. E. areolata. 
E. lutosa. 
11. Genus T'eredra. Pl. XII. 
Animal. Spiral and high ; foot oval with a transverse anterior 
furrow, and two lateral auricles; head bordered with a small 
fringe ; tentacula cylindrical, terminating ina point and very dis- 
tant; eyes indistinct, situated at the foot, and at the external side 
of the tentacula ; mouth without proboscis ; tube of the respira- 
tory cavity very long. 
Shell. Without epidermis, ovate, with a pointed spire, low, 
or subturriculated ; aperture wide, oval, with a strong slope an- 
teriorly ; lower end of the columella twisted. Found in tropical 
seas. ‘I'wenty-four species. 
Terebra macalata. Terebra Senegalensis. 
T. crenulata. T. cingulifera. 
T. dimidiata. T. scabrella. 
T. raphanula. T. lanceata. 
T. muscaria. T. granulosa. 
T. flammea. T. duplicata. 
T. striatula. T. corrugata. 
T. chlorata. T. cerulescens. 
T. cerithina. T. myuros. r 
T. subulata. T. strigilata. 
. T. oculata. T. aciculina, 
T. Babylonica. T. vittata. 
FAMILY XX. 
CotumELtaria. Five genera. 
1. Genus Columbella. Pl. XII. 
Animal. Imperfectly known; eyes placed much below the 
middle of the tentacula. 
‘f 
