GEOLOGY OF THE FOURTH DISTRICT. 



ORGANIC REMAINS OF THE PORTAGE GROUP. 



No. 54. — No. 106, page 243. 



Fig. 1 and 1 a. Avicula speciosa, H. Cashaqua shale, on Cashaqua creek. 



Fig. 2. Ungulina suborbicularis, H. Cashaqua creek. 



Fig. 3. Bellerophon expansus ? (Silurian researches, pi. 5, fig. 37.) Cashaqua creek, 



Fig. 4. Orthoceras aciculum, H. Cashaqua creek. 



Fig. 5. Clymenia? complanata, H. Cashaqua creek. 



Fig. 6. Goniatites sinuosus, H. Cashaqua creek. 



Fig. 7. Pinnopsis acutirostra, H. Cashaqua creek. 



Fig. 8. Pinnopsis ornatus, H. Cashaqua creek. 



No. 55. — No. 107, page 245. 

 Fig. 1 and 1 a. Dclthyris Icevis, H. Western shore of Cayuga lake. 

 Fig. 2. Cardium? vetustum, H. Shore of Lake Erie. 

 Fig. 3. Orthis tenuistriata, H. Crooked lake shore. 

 Fig. 4. Lucina? retusa, H. Lake Erie shore, in Chautauque county. 

 Fig. 5. Nucula lineolata, H. Occurs with the last. 

 Fig. 6. Aslarte subtcxtilis, H. With the last. 

 Fig. 7. Bellerophon striatus ? Bronn. (Phillips, Paleozoic fossils, pi. 40, f. 198.) With 



the last on Lake Erie shore. 

 Fig. 8. Goniatites bicostatus, H. Chautauque county. 

 Fig. 9. Goniatites sinuosus, H. As above, fig. 6. Chautauque county. 



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