PATELLA. 



Plate XXIX. 



Species 75. (Mus. Cuming.) 



Patella livescens. Fat. testa, ovatd, termicidd, de- 

 presso-convexd, apice subacute mucronatd, radiatim 

 dense yranulato-striatd, striis suhundulatis, apice sub- 

 antico ; peUiicido-livesceufe, nigricavte-purpureo ra- 

 diatd, radiis interdum oblique mactdatis, intus irides- 

 cente-argented, plus minus pellucidd. 



The blue-tinged Limpet. Shell ovate, rather thin, 

 depressly convex, rather sharply pointed at the apex, 

 radiately densely granulately striated, striae slightly 

 waved, apex rather anterior; pellucid blue-green, 

 rayed with blackish-purple, rays sometimes broken 

 up into opake blotches, interior iridescent-silvery, 

 more or less transparent. 



Hab. Mazatlan, Gulf of California. 



A very delicate s\ibpcllucid greenish-blue shell, painted 

 with dark purple rays, which show through into the in- 

 terior. The sculpture consists of numerous sbghtly waved 

 granuled lines. 



Species 76. (Mus. Cuming.) 



Patella spectrum. Tat. testa ovatd, subdepressd, aniice 

 subacute acuminafd, atafe crassissimd, radiatim cos- 

 tatd, costis crassis, rudibus, compresse squamatis, in- 

 terstitiis rugoso-striatis ; ferrugineo-albd, squamis in 

 testa juniore nigris, intus alba. 



The spectre Lijmpet. Shell ovate, rather depressed, 

 anteriorly rather sharply acuminated, very thick with 

 age, radiately ribbed, ribs thick, rude, compressly 

 scaled, interstices roughly striated ; rust-white, scales 

 in the young shell black, interior white. 



NuTTALL, Jay's Catalogue of Shells, p. 39. 



Hab. Upper California. 



A very characteristic rough-ribbed shell, the ribs being 

 armed with scales, which, in the young shell, are strikingly 

 cinder-black. 



Species 77. (Mus. Cuming.) 



Patella inradiata. Pat. testa ovatd, elevato-convexd, 

 lateraliter subcompressd, undique subobsolete radiato- 

 clathratd; albidd, lineis perpaucis rufis obscure bi- 

 fariam radiatd, lineis irregularibus, distortis, intus 

 alba, lineis rufis distinctis, medio castaned. 



The in-rayed Limpet. Shell ovate, elevately convex, 

 somewhat compressed at the sides, everywhere rather 

 obsoletely radiately latticed ; whitish, obscurely rayed 

 with a very few red lines in pairs, lines irregular, 

 distorted, interior white, red lines distinct, chestnut 

 in the middle. 



Hab. ? 



A deep cup-like opake-white shell, obscurely latticed 



throughout, irregularly rayed with a few straggling red 



lines, which are most distinctly seen in the interior. 



Species 78. (Mus. Cuming.) 



Patella discors. Fat. testa subquadrato-ovatd, de- 

 pressd, fortiter elevnto-lineatd, circa apicem tubercu- 

 lato-corrngatd ; albidd, lineis intense cceruleo-nigris, 

 intus albd, margine nigro-lineato, latiusculo, testa ju- 

 niore extiis virescente tinctd. 

 The differing Limpet. Shell subquadrately ovate, 

 depressed, strongly elevately lined, round the apex 

 tubercularly crum]5led ; whitish, lines strongly blue- 

 black, interior white, border black-lineated, rather 

 broad, young shell green-tinged without. 

 Phtlippi, Abbild. und Besch. Conch, pi. 2. f. 6. 

 Hab. Mazatlan, Gulf of California ; Lieut. Shipley. 



A depressly convex shell, whitish and peculiarly crum- 

 pled round the apex, then densely sculptured with raised 

 blue-black lines. 



Species 79. (Mus. Cuming.) 



Patella opea. Fat. testa ovatd, antice attenuatd, sub- 

 depressd, radiatim tenuiliratd, liris granulatis, versus 

 apicem obsoletis ; albidd, interstitiis versus marginem. 

 nigro-fuscis, obscure sex-radiatd, intus albd, margiiic 

 latiusculo, nitide lineato. 

 The eyebrow Limpet. Shell ovate, attenuated in froiit, 

 rather depressed, radiately finely ridged, ridges gra- 

 nuled, obsolete towards the apex ; whitish, interstices 

 towards the margin black-brown, obscurely six-rayed, 

 interior white, margin rather broad, neatly lineated. 

 Ndttall, Jay's Catalogue of Shells, p. 38. 

 Hab. Sandwich Islands. 



A rather depressed shell, finely granidatcly ridged, the 

 interstices being coloured towards the margin with rust- 

 black. 



January, 185-5. 



