PATELLA. 



Plate XVIII. 



Species 43. (Fig. a, h, c, Mus. Cuming.) 



Patell.\ vulgata. Pat. testa ovatd, snbju-ofimde convexd, 

 apice svhcentrali, rndiatim striata vel costatd, costis 

 interdum squamato-spinosis ; cinered vel liitesceute- 

 olivaced, obscure radiatd, spinis albidis, intns livido- 

 olivaced. 



The common Limpet. Shell ovate, ratlier deeply convex, 

 apex nearly central, radiately striated or ribbed, ribs 

 sometimes squamately spined ; greyish or yellow- 

 olive, obscurely rayed, spines white, interior livid- 

 olive. 



LiNN^us, Syst. Nat. (13th edit.) p. 1358. 

 Patella depressa, Pennant. 

 Patella vnlgurh. Da Costa. 



Hah. Atlantic shores of Europe. 



This well-known species is curiously varied in sculpture, 

 but not differing materially in colour. Sometimes it is 

 smooth or gently striated, and sometimes ribbed and mi- 

 nutely scale-spined. 



Species 4-3. (Mus. C!uming.) 



Patella nigro-lineata. Pat. testa suboblongo-ovatd, 

 antice subattennatd et mutto hwlinntd, temiiculd, de- 

 pressiusculd, radiatim liratd, liris obtusis, subdistanti- 

 bus, alternis medio terminalibus ; cinereo-nigf'icante, 

 ad apicem. pallescente, liris intense nigris, intiis nigres- 

 cente-c(pruled, micleo ustulato-fuscescente. 



The black-lined Limpet. Shell rather oblong-ovate, 

 slightly attenuated and much inclined anteriorly, 



thinnish, rather depressed, radiately ridged, ridges 

 obtuse, rather distant, the alternate ones terminating 

 about the middle; cinder-black, pale at the apex, 

 ridges deep black, interior blackish-blue, nucleus 

 burnt-brown. 

 Ilab. Island of Camiguing, Philippines ; Cuming. 



A rather thin cinder-black shell, conspicuously rayed 

 with blunt scarcely rayed black ridges, bluish in the inte- 

 rior, with a characteristic light burnt-brown nucleus. 



Species 44. (Mus. Cuming.) 



Patella enneagona. Pat. testa ovatd, aniici snbat- 

 teniuitd et iacUnatd, depressa, crassiusculd, apice ob- 

 tusd, dense crenulato-liratd, pecvMariter enueugond, 

 areis tribus anticis angii-^tis ; lutescente, areis jionis 

 intense purpurea diagonaliter reticulato-strigatis, iii- 

 ttts argenteo-iridescente. 



The nine-sided Limpet. Shell ovate, a little attenu- 

 ated in front, depressed, rather thick, obtuse at the 

 apex, subattenuated and inclined, densely crenulately 

 ridged, peculiarly nine-sided, the three front areas 

 narrow ; yellowish, the nine areas diagonally reticu- 

 lately streaked with deep purple, interior silvery iri- 

 descent. 



Hah. ? 



This very characteristic species is divided on the surface 

 into nine distinct areas, of which the three front are smaller 

 than the rest ; and the diagonal net-striped painting ap- 

 pears in the areas only. 



December, 1854. 



