TAB. XIII. 

 « 



Fig. 

 Ifl — d. Cardium Groenlandicum, j»«^e 160. 



2«, 3. 



» 



venustum, jo. 160. 



3 a, h. 



>} 



nodosulum, jo. 154. 



c. 



}) 



„ portion of surface magnified. 



4 a, b. 



>> 



nodosum,^. 153. 



c. 



)> 



„ portion of surface magnified. 



5 a, h. 



>> 



strigilliferum, />. 154. 



d. 



»j 



„ portion of surface magnified. 



c. 



» 



„ young specimen, showing the introduc 

 tion of an intermediate ray. 



6 a — c. 



)> 



angustatum, p. 157. 



7 a, b. 



35 



Parkinsonijj!?. 158. 



T/ie lines indicate the size of the specimens. 



