FISSURELLA.— Plate VII. 



Kaycd with strong rugose ribs, sculptured with iiTC- 

 gular blunted scales. 



Species 48. (Mus. Cu 



FissiJKELLA HoNDUKASENSls. FUs. lestil obloiigo-ovatd, 

 dcpressiusctdd, antici vix attenuatd, radiatim super- 

 fcialittr costatd, costis obtuse squamato-corrugatis, ori- 

 Jicio obloiigo-ovuto ; hdmcenle-albd, rufo palUde ra- 

 diatd, circa ori/iciiim olivaced et nigripmictaid. 



The Honduras Fissurella. Shell oblong-ovate, rather 

 depressed, but little attenuated anteriorly, radiately 

 superficially ribbed, ribs obtusely squamately wrin- 

 kled, orifice oblong-ovate ; yellowish-white, rather 

 faintly rayed with red, olive and black dotted around 

 the orifice. 



Hah. Honduras ; Dyson. 



This species is distinguished by the superficial wrinkled 

 cliaracter of the spreading ribs, and the dark oUve and 

 black dotted markiug around the orifice. 



Species 49. (Mus. Cuming.) 



Fissurella pica. Fiss. iesid oblongo-ovatd, antice in- 

 clinatd, medio levatd, radiatim tenuiliratd, liris striis 

 ienuibus corrugaiis conceidricis undique eximie dectis- 

 satis, orijicio antico, parvo, rotundato-ovato ; cinereo- 

 nigrd, albo marmoratd. 



The magpie Fissurella. Shell oblong-ovate, inclined 

 anteriorly, lifted in the' middle, radiately finely ridged, 

 ridges delicately crossed throughout with fine wrin- 

 kled concentric striae, orifice anterior, small, rotun- 

 dately ovate ; ash-black, marbled with white. 



Soweeby, Pro. Zool. Soc, 1834, p. 126 ; Conch. lUus. 

 f. 33, 33. 



Hab. St. Elena, West Columbia (on dead shells at a depth 

 of from six to eight fathoms) ; Cuming. 



Very delicately sculptured, and marked with dark rusty 

 lilack and white. 



Species 50. (Mus. Cuming.) 



F'issurella iN.EauALis. Fm. testd ohlongo-ovatd, antice 

 attmaatd et multo inclinatd, medio elevatd, lateribus 

 subcompressis, radiatim tenmliratd, striis concentricis 

 subiiliter clathratd, orijicio parviiisculo, oblongo, medio 

 leviter conlracto ; nigricante, circa orificium cinereo- 

 albicante. 



The unequal Fissurella. Shell oblong-ovate, attenu- 

 ated and much inclined anteriorly, raised in the 

 middle, slightly compressed at the sides, radiately 

 thiuly ridged, finely latticed with concentric striae, 

 orifice rather small, oblong, a little contracted in the 

 middle ; rusty black, ash-white around the orifice. 



SowERBY, Pro. Zool. Soc, 1834, p. 126; Conch. Illus. f.45. 



Hab. Gallapagos Islands (under stones at low water) ; 



The sculpture of this species approaches that of the 

 preceding in character, except in that the concentric sti-ise 

 have not the same wrinkled appearance. 



Species 51. (Mus. Cuming.) 



Fissurella cancellata. Fiss. testa ovatd, depressiusculd, 

 radiatim costatd, costis parviusculis, numerosis, striis 

 concentricis, costas super nodosis, undique cancellatd, 

 orijicio rotundato-ovato, latiusculo ; fuscescente-alid, 

 punctis nigricantibus tessellalim radiatd, orijicio ceeruleo 

 marginato. 



The cancelled Fissurella. Shell ovate, rather de- 

 pressed, radiately ribbed, ribs rather small, numerous, 

 cancellated throughout with concentric strisc, which 

 are nodulous upon the ribs, orifice rotundately ovate, 

 rather broad ; brownish white, rayed in a tessellated 

 manner with rusty black, orifice edged with blue. 



SowERBY, Tankerville Catalogue, No. 802 ; Conch. Illus. 

 f.29. 

 Patella cancellata, Solander. 

 Fvraminella Soweriii, Guilding. 

 Liicapina elegans. Gray. 



Hub. St. Vincent's, West Indies ; Guilding. Honduras; 

 Dyson. 

 Frequently of a delicate flesh-tinge, and always more 



or less strongly characterized by the blue colouring of the 



border of the orifice. 



