20 Bulletin 14 a86 



11. Covered. 25 ft. 163 ft. 2 in. 



12. Layers in bottom of trench at northeastern 

 angle of fort. Pure, thin bedded magnesian lime- 

 stone. Very fossiliferous. 8 ft. 5 in. 171 ft. 7 in. 



c Maclurea 7?iagna. r Triplecia gracilis. 



rr Raphistonia stamineu^n. rr Dalmanella (?) pli- 



a R. planistria var. parvitm. cifera. 



X Murddsonia sp. und. c Di?iorthis defied a (?). 



r Pleurotomaria sp. und. a Asaphus canalis. 



rr Metoptoma montrealensis. r A. marginalis. 



rr Lituites tindatus. rr A. obtusus. 



r Caniarella varians. r Leperditia canadensis 



r C. lo7igirostris. var. nayia. 



c Palaeocistites tenuira- 

 diat2is. 



13. Dark gray, very heavy bedded magnesian 

 limestone weathering in alternating light and dark 

 bands an inch wide. Contains a few specimens of 

 Maclurea magna. 17 ft. 3 in. 188 ft. 10 in. 



14. Very hard, bluish gray magnesian lime- 

 stone in heavy beds. No fossils. 7 ft. 2 in. 196 ft. 



15. One layer of coarse grained sandstone in 

 which there are many holes, as though fossils had 

 been dissolved out. Forms the floor of the western 



part of the parade ground inside the fort. 2 ft. 19S ft. 



16. Hard magnesian limestone containing many 

 large water worn sand grains, i ft. 199 ft. 



r Raphistoma stamineum. r Diriorthis defle£la (?). 



r Caniarella varians. c Asaphus canalis. 



Top of the Chazy. 



17. Covered to bottom of ledge just across the 

 road from the north entrance to the fort. 20 ft. 219 ft. 



