of the Genus Ancillana. 279 



more distinctly striated. The ground-colour of the shell is whitish, 

 delicately banded by different shades of pale chestnut or cinnamon ; 

 which are sometimes interrupted, longitudinally, by others nearly 

 white. 



Inhabits the East Indies, and is rather an uncommon shell : may 

 it not prove to be a variety of A.fulval Mus. Broderip. Nost. 



7. Ancillaria ventricosa. Lam. 



A. lestd ovatd, ventricosd, castaneS; bad oblique biSulcatS ; labia exte- 



riore ad basin crenato, unidentato. 

 Shell ovate, ventricose, chestnut; base with two oblique grooves; outer 



lip at the base crenated, and one-toothed. 

 Ancillaria ventricosa. A. ovata, ventricosa, aurantio-fulva ; varice 



columellari albo, leeviusculo. Lamarck, Ann. du Mus. vol. xvi, p. 304. 



A. ventricosa. A. testd oval&, ventricosS, auranHo-fulvd ; spirtL apice 



oblusiusculd ; varice columellari albo, leeviusculo. Lamarck, Hist, 



Anim. sans Vert. 7, p. 413. 

 A. cinnamomea. Journal of the Royal Institution, vol. xvi. plate 5, 



f. 206. 



Shell, one inch and a third long, of which the spire occupies nearly 

 half an inch. Its form is oval, and more ventricose than any of the 

 preceding species ; its spire is not so thick as the last, but is 

 longer and more slender; the tip, also, is more obtuse; the whole 

 shell is highly polished, and is of a uniform dark chestnut colour, 

 excepting the pillar, which is white. At the base, is a broad ele- 

 vated belt, margined above by a deep groove ; parallel to which, 

 (but within the belt,) is another groove less distinctly marked. The 

 upper groove forms a mucronate tooth on the margin of the outer 

 lip ; having on each side, two or three slight crenulations : the tip 

 of the spire is white. 



J. ventricosa is known from all the foregoing species by the length 

 of its spire: it is more particularly distinguished from cinnamomea, 

 by being shorter and more ventricose, by the pillar being less stri- 

 ated, and by the crenated base of the outer lip. Moreover, an 

 acute observer will detect in this shell, the rudiments of the two 

 additional grooves which margin the upper part of the belt in all 

 the species of the next division. 



