EXPLANATION OF PLATE XX 



FOSSIL FUCOIDS FROM POGIBSHI ISLAND, NEAR KADIAK 

 VILLAGE, ALASKA 



Natural size 



FIG. i. Cancellophycus rhombicum sp. nov. Page 139. 



View of the specimen described. 



2 and 3. Helminthopsis ? labyrinthica Heer. Page 144. 

 Portions of two slabs with fragments of this species. 



