F I S S U R E L LA 



Species 60. (Fig. a, i, Mus. Cuming.) 

 FissURELLA COMFEESSA. Fiss. tcs/d ohlongo-ouitd, au- 

 tice atienuatd, elevatiusctdd, lalerihm subcojnpressd, 

 radiatim sifiamato-liratd, liris winoribus subrudibus 

 in iiderstUiis, orlficio ovali, parviusctdo ; carneo-rufes- 

 ceide aid cceruleo-viridi, vix rndiatd. 

 The compressed Fissurella. Shell oblong-ovate, at- 

 tenuated anteriorly, rather elevated, slightly coni- 

 prossed at the sides, radiately squamately ridged, 

 with smaller rather rude ridgos in the interstices, 

 orifice oval, rather small ; light tlcsh-red or bkie- 

 greeii, scarcely rayed. 

 IM. ? 



The two specimens figured in tlie accompanying plate 

 are differently coloured, but marked by a pc'culiarity of 

 form and sculpture, in which thev exactly agree. 



Species 61. (Mus. Cuming.) 



Fissurella olivacea. Fiu, testd ovald, mdice vix ai- 

 lenuald, subconicd, radia/ii/i subirregulariter rwjoso- 

 liratd, liris obsolete nodosis, orificio oblomjo-opido, 

 medio subco/dntdo ; albldd, olivaceo uilide radiidd. 



The olive Fissurella. Shell ovate, scarcely attenu- 

 ated anteriorly, rather conical, radiately somewhat 

 irregularly roughly ridged, ridges obsoletely imdosc, 

 orifice oblong-ovate, slightly contracted in the mid- 

 dle ; whitish, neatly rayed with olive. 



Gray, Sowerby, Conch. lUus. Fiss. Cat. p. 5. f 57. 



Hab. 



The olive rays are characteristic and well defined. 



Species 62. (Mus. Belcher.) 



Fissurella Lixcolni. Fiss. tesld ovald, medio sub- 

 conicd, vertice anlice leviter ihcUualo, liris radimdi- 

 bits compressis ai/gusUs, allernatim mnjoribus, tirisiiiie 

 concenlricis elcijnider clalhratd, orificio subrolmido : 

 albd, ciiiereo-piirpnreo irreynlariler radintd. 



Lincoln's Fissurklla. Shell ovate, rather conical in 

 the miildle, top slightly inclined anteriorly, elegantly 

 latticed with narrow compressed radiating ridges, 

 which are aUcruatcly larger, orifice nearly round ; 

 white, rayed irregularly with ash-purple. 



June, 



Gray, Sowerby, Conch. lUus. Fiss. Cat. ]). 7. f. 1-1. 

 Hab. Monterey, Calilbruiti. 



This interesting species, named by Mr. Gray after the 

 late Mr. Lincoln, from a specimen in that gentleman's 

 cabinet, was collected by Capt. Sir E. Belcher dming 

 the voyage of H.M.S. Sulphur. 



Species 63. (Mus. Cuming.) 



Fissurella eumata. Fiss. tesld omtd, aidici subattenuatd, 

 elevatiusctdd, lateribm subcompressd, radiatim tenuicos- 

 tatd, costis nmiierosis, subsqnamatis, confertis, margine 

 subacute denticulatis, vertice aidice leviter inclinato, 

 orijicio oblonyo-ovato, medio contracto ; albidd, olivaceo- 

 cinereo radiatd, circa orificimn crrrulescente. 



The smoked Fissurella. Shell ovate, slightly atten- 

 uated anteriorly, rather elevated, a little compressed 

 at the sides, radiately finely ribbed, ribs numerous, 

 subsquaraate, close-set, rather sharply denticulated 

 at the margin, top slightly inclined anteriorly, orifice 

 oblong-ovate, contracted in the middle ; whitish, rayed 

 with olive-ash, bluish around the orifice. 



Hab. ■ ? 



The bluish colouring around the orifice of this species 

 is characteristic. 



Species Ci. (Mus. Cuming.) 



Fissurella densiclatheata. Fiss. te%td ovatd, medio 

 elevatd et aidice incUnatd, liris concenlricis et radi- 

 antibus niidiiiiie dense clalhratd, orificio subrotundo ; 

 albidii unt Jhiciaude, olivaceo radiatd. 



The TiiicKLY-LATTifED FissuEELLA. Shell ovatc, 

 elevated and inclined anteriorly in the middle, 

 thickly latticed throughout with radiating and con- 

 centric ridges, orifice nearly round ; whitish or 

 yellowish, rayed with olive. 



Hub.'- ■ ? 



A very closely latticed species, raised and iueliued 

 anteriorly in the middle. 



Species 6o. (Mus. Cuming.) 

 Fissurella funiculata. Fiss. tesld ovald, anlice alte- 

 nuuld, elevalo-cuntcd, vertice anlice inclinatd, lineit 



