FISSUEELLA.— Plate VIII. 



This shell is of very depressed growth, the sculpture 

 ving an exaggerated rough and swollen appearance. 



Species 57. (Mus. Belcher.) 



FissURELLA cLATHRATA. liss. testd ovatd, medio grada- 

 tim conico-acimimatd, radiatbn codatd, costis rotmida- 

 iis, lira intervenieute, Urii concentricis castas super 

 nodosis fortiter clathratis, margins basali dentato, 

 dentibus binis, orificio parviuscido, orbiad<iri ; albidd, 

 virescente-oUvaceo obscure radiatd, colore basin versus 

 satvratiore. 



The latticed Fissurella. Shell ovate, gradually 

 conically acuminated in the middle, radiately ribbed, 

 libs rounded, with a ridge running between them, 

 strongly latticed witli concentric ridges which are 

 nodulous upon the ribs, basal margin toothed, teeth 

 in pairs, orifice rather small, orbicular, whitish, ob- 

 scurely rayed with greenish olive, the colour being 

 darker towards the base. 



Hnb. China Seas. 



This elaborately carved species is remarkable for its 



high conical form, of which the rounded orifice is the 



summit. 



Species 58. (Mus. Cuming.) 

 Fissurella asperella. Fiss. testd ovatd, antice subat- 

 tenuatd, depressiuscidd, radiatim striata et obsolete 

 costatd, pimctis elevaiis undique asperatd, orificio ob- 

 longo-ovato ; olivaceo rubroque varid, antice albi- 

 radiatd. 



The ROUGn Fissueella. Shell ovate, somewhat attenu- 

 ated anteriorly, rather depressed, radiately striated 

 and obsoletely ribbed, roughened throughout with 

 raised dots, orifice oblong-ovate ; variegated with 

 olive and red, rayed anteriorly with white. 



SowERBY, Pro. Zool.Soc. 1834, p.l27. Conch. lUus. f 71. 



Ilai. Lobos Island, Peru ; Cuming. 



Distinguished by a tinely roughened surface. 



Species 59. (Fig. a and b, Mus. Cuming.) 



FissuRELLA FAScicuLARis. Fiss. testd ovatd, superne 

 subattenitatd, depressiuscidd, lateribus compressis, ra 

 diaiim costatd, costis cequalibus, rotundatis, nodulosis 

 prope marginem obsolete squamatis, orificio oblongo 

 lateribus medio exeavatis ; virescente, olivaceo fasciatd 

 iidcrduni albicante, costis vividi rubris. 



The FASCICULATED FissURELLA. Shell ovate, slightly 

 attenuated anteriorly, rather depressed, compressed 

 at the sides, radiately ribbed, ribs equal, rounded, 

 nodulous, obsoletely squamate near the margin, ori- 

 fice oblong, sides excavated in the middle ; greenish, 

 banded with, olive, sometimes whitish, with the ribs 

 very deep red. 



Lamarck, Anim. sans vert, (l)eshayes' edit.) vol. vii. p. 598. 



Ilab. West Indies. 



This species is very closely allied to the F. pustula, 

 from the same locality, and they arc the only two at pre- 

 sent known of that particular type. 



