FISSURELLA 



Species 2. (Mus. Ciuning.) 



FissURELLA VOLCANO. Flss. iestd ovato-conkd, ui/tice 

 vix attenuatd, radiaiim costaid, costis rndibus, inaqua- 

 Ubiis, Ilk illic majoribus, orifieio oblongo ; albidd, rosea 

 radiatd, radiis nigropimctatk, interdum rosed, pur- 

 pureo-radmtd, circa oHJickm nigropnnctatd. 



The volcano Fissurella. Shell ovately conical, slightly 

 attenuated, anteriorly rather thick, radiately ribbed, 

 ribs rude, uneven, here and there larger, orifice ob- 

 long ; whitish, rayed with rose, rays dotted with 

 black, sometimes rose, rayed with purple, black- 

 dotted around the orifice. 



Hab. Santa Barbara, California ; Hinds. 



An elevated conical shell varying somewhat in colour, 

 but similarly designed, collected by Capt. Sir Edward 

 Belcher, and his assistant-surgeon Mr. Iliuds, during the 

 voyage of the Sulphur. 



Species 8. (Mus. Cuming.) 



FiSSURELLA NIGROPUNCTATA. FisS. tc'S/d OVatd, SubcOllicd, 



ci'assd, radiaiim costatd, costis rudibus, iiiaqualibus, sub- 

 acutis, margine basali acute C7-emdato, orifieio oblongo, 

 lateribus coarctato ; viresceuie-albd, interrnpte intettse 

 antliracind. 



The black-dotted Fissurella. SheU ovate, somewhat 

 conical, thick, radiately ribbed, ribs rude, uneven, 

 rather sharp, basal margin sharply crenulated, orifice 

 oblong, contracted at the sides; greenish-white, ribs 

 painted in an interrupted manner with very dark 

 coal-black. 



SowERBY, Pro. Zool. Soc, 1834. p. 125. 



Hab. GaUapagos and Lobos Island, (under stones on the 

 shore) ; Cuming. 



The interior of the shell is also of a sea-green colour, 

 and it is mostly eroded on the outside in the vicinity of 

 the orifice. 



Species 12. (Mus. Cuming.) 

 Fissurella vieescens. liss. testa ovatd, elevatiusculd, 

 radiatiiii costatd, costis subinaqualibus, basin versus 

 tumidiuscidus, orifieio late oblongo, medio paulidmn 

 coarctato; Cfprnlescente-viridi, circa orificium albidd, 

 rosea sparsim tiiicld, iidiis virescente. 



August. 



The greenish Fissurella. ShcU ovate, rather elevated, 

 radiately ribbed, ribs somewhat uneven, rather 

 swollen towards the base, orifice broadly oblong, a 

 little contracted in the middle ; bluish-green, white 

 around the orifice, sparingly pink-stained, interior 

 greenish. 

 Sowerby, Pro. Zool. Soc. 1834, p. 12.5. 

 Ilab. Panama (in exposed situations on rocks at low 

 water) ; Cuming. 

 The orifice is rather broad in this species, and charac- 

 terised by a small denticular contraction on each side. 



Species 23. (Mus. Cuming.) 



Fissurella maxima. Fiss. testd ovatd, depressiuscidd, 

 crassd, radudim liratd, liris submdosis, estate swbobso- 

 letis, margine basali wudulato, orifieio rotundato-ovato ; 

 virescente-albd aidfidvescente, purpureo-lacca conspicite 

 radiatd. 



The very large Fissurella. Shell ovate, rather de- 

 pressed, thick, radiately ridged, ridges slightly no- 

 dose, somewhat obsolete with age, basal margin 

 undulated, orifice rotundately ovate ; greenish-white 

 or light fulvous, conspicuously rayed with purple- 

 lake. 



Sowerby, Pro. Zool. Soc. 1834, p. 133. 



Hab. Valparaiso (on exposed rocks and under stones at 

 low water) ; Cuming. 



In addition to the magnificent specimen here figured 

 from Valparaiso, Mr. Cuming possesses one of smaller size 

 from Cape Horn, in which the radiating ridges are more 

 l)roniinently developed and obscurely noduled. 



Species 23. (Mus. Cuming.) 



Fissurella Barbadensis. Fiss. testa ahlongo-ovald, 

 subconicd, lateribus interdum siibcompressd, radiaiim 

 costatd, costis iiKequalibus, acutiusculis, squamoso- 

 asperis, decern ad duodecim prominentioribus, orficio 

 suborbiculari ; hdescente-albd, maculis irregularibus 

 nigris radiatd, interdimi rosed, intns virescente. 



The Barbadoes Fissurella. SheU oblong-ovate, rather 

 conical, sometimes a little compressed at the sides, 

 radiately ribbed, ribs uneven, rather sharp, bristled 

 with scales, ten to twelve ribs more prominent than 



1849. 



