EXPLANATION OF PLATE XX 
Fossil Fucoids from Pogibshi Island, near Kadiak 
Village, Alaska 
Natural size 
Fig. i. Cancellofhycus rhombicum sp. nov. Page 139. 
View of the specimen described. 
2 and 3. Helminthofsis ? labyrinthica Heer. Page 144. 
Portions of two slabs with fragments of this species. 
