TAB. VI. 
. Pecten Princeps, page 31. 
. Pecten opercularis, p. 35. 
a. left valve of var. lineatus. 
b. id. var. reconditus. 
¢: id. var. scabrotus. 
d. specimen with united valves, var Audouinii. 
. Pecten dubius, 7. 38. 
left valve of var. partim imbricatus. 
. Pecten pusio, p. 33. 
a. specimen with united valves of var. striatus. 
6. left valve, var. limatus. 
ec. right valve, var. striaturus. 
. Pecten gracilis, p. 37. 
The lines indicate the size of the specimens. 
