CONCHOLOGY. 143 



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. 



\ I. Genus Terebra. PI. 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 in a 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. Twenty-four species. 



f- 



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. caerulescens. 



T. cerithina. T. myuros. 



T. subulata. T. strigilata. 



T. oculata. T. aciculina. 



T. Babylonica. T. vittata. 



FAMILY XX. 



CoLUMELLARiA. Fivc gcucra. 



1. Genus Columbella. PI. XII. 



Jnimal. Imperfectly known ; eyes placed much below the 

 middle of the tentacula. 



