TRACHELIPODA. 



77 



reversed cone, aperture longitudinal, linear, toothless, narrow, 

 and effuse at the base. 



Conus generalis. — The General Cone. Plate XI. fig. 

 1. Shell oblong, turbinate, reddish-brown, or orange, black 

 at the base, with interrupted white bands, the spire flat, 

 marginate, with the apex acute. Two and a half inches long. 

 Inhabits the Indian seas. 



There are two sections of this beautiful and very extensive 

 genus. 



I. Shells coronate, or provided with knobs, round the 

 edges of the spiral volutions. 



II. Shell not coronate. 



Genus 2. — OLIVA Lamarck. 



Generic Character. — Shell subcylindrical, convolute, 

 smooth, and glossy; spire short, with canaliculated sutures; 

 aperture longitudinal, emarginate at the base; columella 

 obliquely striated, or plaited. 



The volutions of this genus, being separated by a canal, at once dis- 

 tinguish them from those of the Yoluta and Mitra ; the same distinction 

 separates it also from Ancillaria. 



Oliva cruentata. — The Bloody Olive. Plate XI. fig. 

 2. Shell pale fawn-coloured with large triangular spots of 

 purple, edged with deeper fawn ; two dark brown spots on 

 the edge of the outer lip ; suture of the spire deep ; pillar 

 plaited to nearly the top. One and a half inch long. In- 

 habits the Indian seas. 



Genus 3. — ANCILLARIA Lamarck. 



Generic Character. — Shell oblong, subcylindrical ; spire 



short, not caniculate at the sutures ; aperture longitudinal, 



effuse and hardly emarginate at the base ; lower portion of 



the columella with an oblique callosity or varix. 



The columella never being plaited distinguishes the shells of this 

 genus from those of Oliva. The callous oblique band, at the base of 

 the columella, separates it from Terebellum. 



Ancillaria cinnamomea. — The Cinnamon Ancillaria. 

 g3 



