PATELLA. 



Plate XLII. 



Species 140. (Mus. Cuming.) 



r.\TELL.\ MAMILL.^TA. Pat. testil ovatd, antice vix atte- 

 niiatd, acute convexd, apice tmcinata, sqitamarum serle- 

 biis numerosis minutis muricato-radiatd, striis concen- 

 tricis deciissatd ; sordide olivaced, obsatre lateraliter 

 biradmtd, intits ccei-ulesceute, maculd cadaned centrali 

 antice peculiariter productd, marcjine nigricante, lata. 



The nipple Limpet. Shell ovate, slightly attenuated in 

 front, sharply convex, hooked at the apex, prickly 

 rayed with numerous ridges of fine scales, decussated 

 with concentric striffi ; dirty olive, obscurely laterally 

 two-rayed, interior bluish, with a central chestnut 

 blotch, peculiarly produced anteriorly, margin black- 

 ish, broad. 



NuTTALL, MS., Mus. Cuming. 



Hab. Upper California. 



The outer surface of this species is prickly rayed through- 

 out with minute scales, whilst in the interior the central 

 chestnut blotch is curiously attenuated and produced in 

 front. 



Species 141. (Mus. Cuming.) 



P.'iTELLA UNCINATA. Pat. testd ovatd, acute conoided, 

 apice paululum antice uncinato, radiatim prof use tenui- 

 liratd, interstiis obscure caucellatis ; albidd, nigri- 

 cante-fusco tessellatd aut diagonaliter strigatd, ititus 

 ccBrulescente-albd, pellucido-tessellatd et castaneo pat- 

 fide tiiictd. 



The hooked Limpet. Shell ovate, sharply conoid, apex 

 a little hooked anteriorly, radiately profusely finely 

 ridged, interstices obscurely cancellated ; whitish, tes- 

 sellated or diagonally streaked with blackish-brown, 

 interior bluish-white, transparent tessellated and 

 stained with faint chestnut. 



Hab. ? 



A very prettily tessellated species, closely finely ridged 

 throughout, the shell being shai-ply conical and slightly 

 hooked at the apex. 



Species 142. (Mus. Cuming.) 



Patella bieadiata. Pat. testd suborbiculari, conoideo- 

 depressd, apice subcentrali, radiatim striato-liratd ; 

 albidd, caruleo-niffro prope ruarginem radiatd, radiis 

 duahus latis pallidis postice conspicui ornatd, intus 

 eodem colore vivide pictd. 



The two-rayed Limpet. Shell nearly orbicular, co- 

 noidly depressed, apex nearly central, radiately stri- 

 ately ridged ; whitish, rayed with blue-black near the 

 margin, conspicuously ornamented posteriorly with 

 two broad pale bands, interior vividly painted with 

 the same colour. 



Ilab. China Seas. 



This species is characterized, among other features, by 

 twt) broad pale bands, radiating from behind the apex, 

 especially distinct in the interior. 



Species 143. (Mus. Cuming.) 



Patella nimbus. Pat. testd ovatd, antice vix attenuatd, 

 subacute convexd, apice subantico, undique decussatim 

 uudato-striatd, striis radiantibusfortioribns ; olivaced, 

 lutescente eleganter radiatd, circa apiceni purpuras- 

 cente. 



The nimbus Limpet. Shell ovate, slightly attenuated 

 anteriorly, rather sharply convex, ajiex somewhat an- 

 terior, everywhere decussately wave-striated, the ra- 

 diating strife being the stronger ; olive, elegantly rayed 

 with faint yellow, purplish round the apex. 



Hab. ? 



The rays of this species are very softly expressed, and 

 have more the appearance of rays of light than is presented 

 in any other species, whilst the surface strife are finely 

 waved throughout. 



Species 144. (Mus. Cuming.) 



Patella lima. Pat. testd oblongo-ovatd, convexd, apice 

 antico, submicinato, radiatim coii/ertim lirato-striatd, 

 striis undique mimdissime muricato-squainatis ; vires- 

 cente-oUvaced, intus vivide cceruleo-virescente, margine 

 pnrpureo-fuscd. 



The file Limpet. Shell oblong-ovate, convex, apex an- 

 terior, rather hooked, radiately closely ridge-striated, 

 striae very minutely prickly scaled; greenish-olive, 

 interior bright blue-green, pm-plc-brown at the mar- 

 gin. 



Hab. ? 



The entire surface of this species is closely sculptured 

 ith very minute prickly scales. 



May, 1855. 



