PATELLA. 



Plate XXIV. 



Species 60. (Mus. Cuming.) 



Patella cinis. Fat. testa ovafd, aniice subatteimatd, 

 subacute elevaio-convexd, striis costisqne latis retiisis 

 radlatd, costis interdiim, fere obsoletis ; cinereo-nigrd, 

 strigis albidis nndatis nebtdatis ornatd, inttis nitente- 

 albd, nucleo intense castaneo, parvo. 



The cinder Limpet. Shell ovate, a little attenuated 

 in front, rather sharply elevately convex, rayed with 

 striiB and broad retuse ribs, ribs sometimes almost 

 obsolete ; cinder-black, marked with clouded waved 

 white streaks, interior shining white, nucleus deep 

 chestnut, small. 

 Hab. Monterey, Lower California ; Hartweg. 



The colouring of this species is a streaked pattern of 

 faint bluish-white waves upon a dark cinder-black ground. 



Species 61. (Mus. Cuming.) 



Patella diaphana. Pat. testa ovatd, untice subat- 

 tenuatd, depressd, profuse tenuiliratd, Jiris plus minus 



indistincte grannlatis ; oUmceo-viridi, lutescente-aJbo 

 peculiariter radiatd et rarkyatd, intus diap/iai/o-vires- 

 cente, ad marginem late marmoratd. 



The diaphanous Limpet. Shell ovate, slightly at- 

 tenuated in front, depressed, profusely finely ridged, 

 ridges more or less indistinctly granuled ; oLivc-green, 

 peculiarly rayed and variegated with yellowish-white, 

 interior diaphanous green, broadly mottled at the 

 margin. 



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



Hah. Upper California ; Nuttall. Central America ; Cu- 

 ming, Hinds, Kellett. 



Distinguished by a peculiar diaphanous green colouring, 

 more or less densely variegated and mottled exteriorly with 

 yellowish-white. 



Fig. 62. (Mus. Cuming.) 



A variety of P. exarata, described at Plate XIX., more 

 distinctly ridged. 



December, lSo4. 



