13 



spirally passing on the whorls to be lost in the deeper colour of the 

 apicine volutions ; spire acuminated, about half the length of the 

 shell ; volutions seven, convex ; aperture wide, subquadrangular ; 

 outer lip rather thin, denticulated within on its whole extent ; inner 

 lip slightly denticulated along its rather angular inner edge ; fine 

 strife traverse the anterior part of the dorsum ; peritreme of a dark 

 purplo-brown colour ; channel verj^ short. 



Length, -//q of an inch ; width, -^^ of an inch. 



Hub. Sandeago, California. Cab. Cuming, Gaskoin. 



20. CoLUMBELLA loDOSTOMA. Tcsfu oblongo-ovattt, irregula- 

 riter brunnea ; spird acuminata, apice ccBruleo-brmmeo ; an- 

 fractibus septem vel octo rapthn longitudinaliter decrescen- 

 tibus ; costellis prope aperturam minus prominentibus, costis 

 ad posticum marginem in tuberculis postice terminantibus ; 

 aperturu postice latiuscidd, antice sub acuta ; labio externa 

 tenui, intus denticulato ; labio interno inttis denticulato, varice 

 promine7ite marginato ; dorso antice extus striata; canali lan- 

 giuscida ; margine peritrematis purpureo-brunnescente. 

 Shell oblong-ovate, of an irregular brown colour ; spire acumina- 

 ted, apex dark bluish brown colour ; volutions seven to eight, greatly 

 decreasing in circumference on to the apex, strongly ribbed longitu- 

 dinally, less strongly towards the aperture, the ribs terminating in 

 colourless nodules at the posterior edge of the volutions ; aperture 

 rather broad posteriorly, subacute anteriorly ; outer lip thin, denticu- 

 lated to its full extent within ; unier lip denticulated within, bordered 

 by a rather prominent varix, from the outside of which striae pass 

 over the dorsum of the channel ; channel rather long and broad ; 

 edge of peritreme of a dark purplish brown colour. 

 Length, -j^ of an inch ; width, -^ of an inch. 

 Hab. Port Essington. Cab. (specimen unicum) Gaskoin. 



CvPRiEA Clara. Testa subcylindraceo-ovalis, rvfescenti-cinerea, 



antice et postice supra extr emit ate maculd brunned ornata ; fas- 



ciis latis saturatiaribus tribus ; basi marginibusque albescenti- 



bus ; aperturd latiusculd subspirali ; labia externa crassiusculo, 



dentibus circa viginti-sex, regularibus, prominentibus ; interno 



subspirali, dentibus circa viginti ; sulco calumellari profunda 



lataque, int^is denticulato ; marginibus rotundatis, incrassatis ; 



extremitatibus abtusis, punctis minutissimis nigris notatis. 



Shell subcylindrical-ovate, of a hghtish red-ash colour, with three 



broad bands placed about the anterior and posterior thirds and middle 



of the shell, the middle one being narrowest, the lighter colour of the 



shell being observed between them ; a rather large reddish-brown 



marking over the anterior and posterior extremities, gradually fading 



along the margins ; base whitish in a degree tinted with pink, round ; 



the calcareous deposit forming the denticulations extends on to the 



sides of the shell ; aperture moderately wide, subspiral ; outer lip 



thick, with about twenty-six regular, even, rather prominent teeth 



occupying the entire thick edge of the lip but not extending on to 



