FISSUEELLA.— Plate XIII. 



latticed throughout with radiating sharp compressed 

 ribs and riblets, and concentric ridges, oriiice small, 

 ovate; whitish, somewhat obscurely blotch-rayed 

 with light rust-brown. 



Krauss, Sudafric. Moll. p. C7. pi. -i.f. 10. 



Hah. Natal, South Africa. 



A characteristic species of the same type as our British 



F. reticulata. 



Species 95. (Mus. Cuming.) 



FissuBELLA CoNioiDES. Fiss. testd ovatd, elevato-conicd, 

 crassd, radiatim. corrugato-costatd, costis valde irregu- 

 lariius et rugosis, orificio ovato, centrali ; albd, circa 

 orificium cinereo-nigricante, intus virescente. 



The Conia-like Fissurella. Shell ovate, elevately 

 conical, thick, radiately corrugately ribbed, ribs very 

 irregular and rugose, orifice ovate, central ; white, 

 ashy black around the orifice, gi-eenish in the interior. 



Hab. Cape of Good Hope. 



Closely allied to the F. g/aiicopis and aladas/ritca from 



the Cape de Verd Islands. 



Species 96. (Mus. Cuming.) 



Fissurella cruciata. Fiss. testa oblongo-ovatd, antice 

 incUnatd, lateribus subcompressd, Uris radiantibus 

 striisqtie concentricis elevatis nilide clathratd, Uris 

 alternis minorihcs, prope orificium evanidis, orificio or- 

 biculari-ovato ; albd, radiis quat7ior ferrugineis inter- 

 niptis basin versus notatd. 



The cross-marked Fissurella. Shell oblong-ovate, 

 incbned anteriorly, rather compressed at the sides, 

 neatly latticed with radiating ridges and raised con- 

 centric strise, alternate ridges smaller and fading 

 near the orifice, orifice orbicularly ovate; white, 

 marked towards the base with four interrupted rust- 

 brown rays. 



Krauss, Sudafric. Moll. p. (57. pi. 4. f. 9. 



Hab. Natal, Soutli Africa. 



The cross-marked painting, which is more defined in 

 the specimen represented by Dr. Ki'auss, must not be re- 

 garded as a specific character. 



Species 97. (Mus. Cuming.) 

 Fissurella lentiginosa. Fim. testd oblongo-ovatd, gib- 

 boso-concavd, depressiusculd, Uris radiantibus striisque 

 concentricis elevatis undique dense clathratd, orificio 

 antico, orbiculari-ovato, subamplo ; albd, fusco hie illic 

 eximie lentiginosd, maculis grandibus nigricante-fuscis 

 prope ad basin. 

 The freckled Fissurella. Shell oblong-ovate, gib- 

 Irously concave, rather depressed, thickly latticed 

 throughout with radiating ridges and concentric 

 raised Lines, orifice anterior, orbicularly ovate, rather 

 large ; white, delicately freckled here and there with 

 brown, with large blackish-brown blotches next the 

 base. 



Hab. ? 



The freckled style of painting appears to be a some- 

 what characteristic feature in this species. 



Species 98. (Mus. Cuming.) 



Fissurella larva. Fiss. tesid ovatd, elevato-conicd, 

 costis distantibns lirisqne intermediis striis concentricis 

 nitide clathratd, orificio antice inclinato, ad extremita- 

 tem anticam pectdiariter contracto; nigricante-olicaced, 

 circa orificium hie illic albo notatd. 



The mask Fissurella. Shell ovate, elevately conical, 

 neatly latticed with distant ribs with intermediate 

 ridges and concentric strife, orifice inclined anteriorly 

 aud peculiarly contracted at the anterior extremity ; 

 blackish-olive, marked here and there about the 

 orifice with white. 



Hub. Island of St. John's, West Indies; Hartvig. 



A strongly sculptured shell with a very peculiar orifice, 



which is unusually contracted at the anterior end. 



