PETRICOLA. 



Plate. 



Kquistriata, Sowerhy in. 



bicolor, Sowerhj HI. 



hi^OTtita,, Sowerhy H. 



Cliincnsis, Deshayes II. 



concinna, Soivei-hn I. 



costata, GTa.y HI- 



cosieWrtto, Lamarck 11. 



cultellus, Z)cs/io^<?s I. 



dactylus, Soiverhij I. 



ihciissata, Turtoii H. 



denticulata, <S'o(fcr% II. 



divaricata, Gray III. 



alega.ns, Deshayes I- 



c'Uiptica, Soiverby H- 



font icata, Say II- 



(;(iia, Middondorf II. 



iirnciWs, Deshayes I. 



19 

 17 

 U 

 13 



3 

 24 

 II 







11 



y 

 •22 



inccrta, Sotccrhy II. 



lapicida, Chemnitz III. 



lithopliaga, Retzius II. 



nivea, Chemnits II. 



pholadiformis, Lamarck I. 



robusta, Soioerhy HI. 



rocellaria, Lamarck II. 



T\shigmo&ii^ Adams and Angas III. 



rugosa, Sowerby II. 



7iipt' rella, Ji\a,mYi\\e II. 



semilaraellata, Zamarc^ III. 



seiTata, Deshayes I. 



solida, Sowerby H. 



fenwis, Sowerby II. 



striata, Lamarck ..... II. 



typica, Jbwas HI- 



\Q-atr\Q,oia, Desliayes HI- 



