OLIVA. 27 



nata, elongata ; columella antice castanea, elongato-pcrob- 

 lique plicata; apertura lata, brevi; labio arcuato, medio et 

 antice dilatato, intus prope suturam incrassato. — Less stout 

 than 0. testacea, generally of a pale colour, tbe wborls of* the 

 spire convex, and the anterior callus-folds — except in the 

 white variety — chestnut. I have examined many of the 

 animals, and never found an operculum. 



138. pallida (f. 341-343), Swainson. — 0. hiatula similis ; 

 spira, breviori ; apertura et columellas callo antico lividis. 

 Variat aurantio-fulva. — Like 0. hiatula, but with shorter 

 spire and less ventricoso whorls. The interior of the aper- 

 ture and the folds of the anterior callus are purplish-brown. 

 The variety 0. indusica, Reeve, is orange-buff, with pinkish 

 interior. 



139. contortdtlicata (f. 332, 333). — Ovato-subfusiformis, 

 plumbea, transverse minutissime striata, infra suturam fulvo 

 unifasciata ; spira, conica, apieulata, callosa, anfractibus ro- 

 tuudis ; balteo supra et infra albo, medio aurantio ; colu- 

 mella, tortuosa, callosa, callo antico contorto, plicis duabus, 

 postica, divisa ; apertura intus fusca,, pallide unifasciata. — 

 Very remarkable for the twisted folds of the anterior callus. 



140. intricata (f. 344, 345), Marrat. — Elongato-subfusi- 

 formis, subangustata, pallide cinerea aut fulva, lineis latis 

 pallidis griseo-fuscis undulatis notata; spira conica, acuta, 

 anfractibus planulatis, sutura, maculis castaneis magnis no- 

 tata, ; balteo diviso, parte postica lata, pallido ; columella 

 callosa, antice densissime plicata ; callo antico biplicato, 

 inter plicas profunde sulcato; apertura intus pallida; labio 

 subincrassato, intus maculato. — This species resembles O. 

 nebulom, but differs in form, colour, and columellar plaits. 

 It is perhaps nearer the 0. ancillaroides. 



141. ancillaeoides (f. 346), Reeve. — Oblongo-subfusi- 

 formis, griseo-fulva, ad suturam castaneo maculata; colu- 

 mella plicata, alba,, calli antici plicis duabus tortuosis validis 

 acutis ; spira subelevata, anfractibus paucis, postice rotun- 

 dis ; apertura breviuscula, intus sordide alba ; labio utrinque 

 abraso, margine acuto. — Not unlike 0. testacea in form. 



142. nitellina (f. 347), Duclos. — Ancillariasformis, angusta, 

 rufo-fulva; spira elongato-conica, anfractibus convexis, bal- 



