riSSUllELLA,— Plate XI. 



SowERBY, Pro. Zool. Soc. 1834, p. 128. 

 Hab. St. Elena, West Columbia ; Cuming. 



Mr. Cuming only collected a single specimen of this 

 very characteristic species, and it still remains unique in 

 his cabinet. 



Species 77. (Mus. Cuming.) 



ElSSUEELLA GALERICULUM. Fiss. testd ovald, antice 

 valde attenuatd, crassinsndd, lateribus compressd, ra- 

 diatim miiUistriatd, orificio ohlongo, subamplo, lateribus 

 medio leviter excavatis ; intetise rufo-purpured, utrinque 

 orificium albiradiaid, margine interno latimado, riifo- 

 purpureo. 



The bonnet Fisscrella. Shell ovate, very much 

 attenuated anteriorly, rather thick, compressed at 

 the sides, radiately many-striated, orifice oblong, 

 rather large, sides slightly excavated in the middle ; 

 deep red-purple, wliite-rayed on each side of the 

 orifice, internal margin rather broad, red-purple. 



Distinguished by its attenuately compressed form, and 

 deep crimson-purple colouring. 



Species 78. (Mus. Cuming.) 



FissURELLA SALEBROSA. Fiss. ti'std suborbiculari-ovatd, 

 depressd, radiatim rude costatd, eostis subtrijualihus, 

 laminis concentrieis tmdique conspicue fmbriaio-'sqiia- 

 niaiis, orificio rotundato ; albidd, fusco hie il/ic tim-ta 

 el lineari-notatd. 



The rugged Fissurella. Shell somewhat orbicularly 

 ovate, depressed, radiately rudely ribbed, ribs nearly 

 equal, conspicuously fimbriately squamate throughout 

 with concentric laminae, orifice rounded ; whitish, 

 stained and linearly marked here and there with 

 brown. 



Hah. Kurrachee, Mouth of the Indus. 



The ribs of this species are surmounted throughout 



with rough erect furbelowed scales. 



