PATELLA. 



Plate IV. 



Species G. (Fig. a, b, Mus. Cumiug.) 



Patella testddinama. Pat. testa ovato-rotundatd, 

 crassinsciiM, sendpellucida, apice antice subiiicUnato, 

 strik radiatis et concetitricis decussatd; lutescente, 

 intense piirpto'eo-rv/o reticulato-radiatd et maculatd, 

 iii/iis aryetded, ad marginem pmpureo macidatd. 



The toetoise-shell Limpet. Shell ovately rounded, 

 rather thick, semipellucid, apex rather inclined an- 

 teriorly, decussated with radiating and concentric 

 striae ; yellowish, net-rayed and blotched with deep 

 purple-red, interior silvery, blotched with purple at 

 the margin. 



LiNN/Eus, Syst. Nat. (12th edit.) p. 1260. 

 Lottia testudinaria, Sowerby. 



Hah. Phdippine Islands ; Cuming. 



Though a solid shell, this species is comparatively of 

 transparent substance. The purple-red painting is de- 

 posited in a peculiar smeary style, always uniform and 

 characteristic. The interior is lined with a delicate silvery 

 nacre, into which the dark red rays blend from the margin. 



Species 7. (Pig. a, b, Mus. Cuming.) 



Patella zebra. Pat. testa ovatd, acute convexd, suballd, 

 apice pronduente, antice sitbiucUiiato, radiatim rude 

 nodoso-costatd, costis atate evanescentibus ; griseo-albd, 

 nigro-fiisco radiatim strigatd, inius alhd, vitello tinctd, 

 marr/ine mac/dis idgro-fiiscis binis cotispicaS picto. 



TuE ZEBKA Limpet. Shell ovate, sharply convex, rather 

 high, apex prominent, somewhat inclined anteriorly, 

 radiately roughly nodosely ribbed, ribs fading with 

 age ; gi'eyish-white, radiately streaked with black- 

 brown, interior white, tinged with yelk-yellow, mar- 

 gin conspicuously painted with narrow black-brown 

 blotches in pairs. 



Patella rustica, Menke (not of Linnaeus). 



Hab. Swan Elver. 



A very characteristic species, strongly rudely nodule- 

 ribbed in the young state, the ribs being about two-and- 

 twenty in number, but with age they become faint. The 

 shell is of a greyish-white, vividly rayed with black-brown 

 streaks, and the inner margin is conspicuously and neatly 

 painted with narrow blotches of the same colour in pairs. 



October, 1854. 



