PATELLA. 



Plate X. 



Species 18. (Fig. a, b, c, Mus. Cuming.) 



Patella, venosa. Pat. testa ovatd, convexd, atate stib- 

 altd, antice suicontradd, in teddjuniore radiatim cos- 

 tatd, costis panis, subdidanilbus, atate plus minus 

 obsoletis, prope marffinem varicosis; pellacido-alhd, 

 castaneo-purpureo irregulariter venoso, venis ad marffi- 

 nem bifiircaiis, hitus purpureo-castaneo intense tinctd. 



The veined Limpet. Shell ovate, convex, rather high 

 with age, a little contracted in front, in the young 

 shell radiately ribbed, ribs smaU, rather distant, more 

 or less obsolete with age, varicose near the margin ; 

 transparent-white, ii-regularly veined with chestnut- 

 purple, veins bifurcated at the margin, deeply stained 

 with purple-chestnut in the interior. 



Hah. Isle of Chiloe, West Columbia ; Cuming. 



A transparent shell, gently radiately ribbed in the young 

 state, of transparent-white substance crossed with veins of 

 rich chestnut-purple. The veins are zigzag-biforked at 

 the margin ; and the interior of the shell is richly stained 

 with the same colour, bronze-hued. 



Species 19. (Fig. a, b, Mus. Cuming.) 



Patella Magellanica. Pat. testa ovatd, pyramidali- 

 concavd, altissi.md, radiatim costatd, costis latiuscidis, 

 rudibus, obsolete retuse tuberculatis ; cinereo-fuscd, 

 costis saturatioribns, niffro-maculatis, intus cinereo- 



The Magellan Limpet. Shell ovate, pyramidally con- 

 cave, vei-y high, radiately ribbed, ribs rather broad, 

 rude, obsoletely bluntly tubercled ; ash-brown, ribs 

 darker, blotched with black, interior ash-tinged. 



Martini, Conch. Cab. vol. i. pi. 5. f. 40 and 41. 

 Hab. Straits of Magellan ; Cuming. 



This species is distinguished chiefly by its lofty pyra- 

 midal cup-form, a character not discernible in our figure ; 

 and it is rayed throughout with broad obtuse ribs ob- 

 scurely bluntly tubercled. 



Species 20. (Fig. a, b, Mus. Cuming.) 



Patella Aegenvillii. Pat. testa subohlonffo-ovatd, an- 

 tice paululum contractd, profundi convexd,' radiatim 

 dense tenuiliratd, liris plantilatis, crenulatis, alterna- 

 tim majoribus, interstitiis ad marffinem bidenticulalis ; 

 atrd, versus apicem plus minus erosd, intns murmoreo- 

 alhd, ferruffineo-lideo tinctd, marffine atrd. 



Akgenville's Limpet. Shell somewhat oblong-ovate, 

 a little contracted in front, deeply convex, radiately 

 densely finely ridged, ridges flat, crenulated, alter- 

 nately lai'ger, interstices bidenticulated at the mar- 

 gin ; jet-black, more or less eroded towards the apex, 

 interior marble-white, tinged with rusty-yellow, black 

 at the edge. 



Keauss, Siidafrikanische Mollusken, p. 49. 



Lepas ecaillS, Argenville, Conch, vol. i. p. 504. pi. 3. 

 f. G. 



Hab. Table Bay, South Africa. 



The sculpture of this shell consists of a number of 

 close-set sharp jet-black ridges inclined to be white in the 

 interstices, but more or less eroded towards the apex. 

 The margin is neatly set round with sharp denticles in 

 pairs. 



October, 1854. 



