34 



NKW YORK STATE Ml 



Fucoides harlani, n, 12. 

 Furnaceville iron ore, 8, 14. 



Gomphoceras sp., 10. 



Gray band of the Medina, u. 



Greece, rock terrace, 6. 



Guelpfa fauna. 20, 21, 24, 25, 26; in 



Lockporl dolomite, S, 20, 25, 26; 

 list of species found in vicinity of 

 Rochester, 26 

 Gypsum in Camillus shale, 31. 



Hall, James, cited. 5, 17, 19, 22, 24. 

 Halysites, 23. 



agglomeratus, 26. 



catenularius, 26. 

 Heliophyllum sp., 26. 

 Hight of lowest area OH map, 6. 

 Homalonotus delphinocephalus, 19. 

 Hormotoma whiteavesi, 27. 

 1 [udson River group, 9. 

 1 [ughmilleria, 29. 



socialis. 30. 

 vaf. robusta, 30. 

 Hydraulic cement made from Bertie 



waterlime, 32. 



Illaenus ioxus, 17, 19. 

 Im tcaulis plumulosus, 19. 

 Irondequoit bay, 6, 7. 



Iri.ndequoit limestone/ 8, 16-17. 



Kionoceras darwini, 27. 

 cf. medullare, 2-. 



Latitude and longitude <.f region, 6. 



Leperditia, 29. 

 sp., 27. 



balthica var. guelphica, 27. 

 scalaris, 31, 32. 



Leptaena rhomboidalis, 17, 10. 



Lewiston, Lockporl dolomite, '.-7. 



Lichas boltoni, 19. 



Lingtda, 29. 

 cuneata, n. 

 lamellata, [9. 



Little Falls dolomite, thicknes 



Lockporl dolomite. 6, 8, 17: descrip- 

 tion, 1 0-27 ; fauna, 24; Guelph 



fauna, s. s . physical condi- 



tions during late Lockport tune, 

 23 ; thickness, 24. 



Lophospira bispiralis, 27. 



Lorraine shales, 9; thickness, 8. 



Lowville limestone, thickness, 8. 



Lj riopecten ( ? ) orbiculatus, 10. 



Macrochilina sp. t 27. 



Magnesian limestone in Camillus 



shale. 31. 



Manlius limestone, 7. 



Medina formation. S; description, IO- 

 12; thickness, io, 11; economic im- 

 portance. 12. 



Meristella, 31. 



Mississippian sea, strata laid down 

 in, 10. 



Mountain building, 9. 



Mytilarca eduliformis, 26. 



Niagara formation, 8, 17-27. 

 Xiagaran group, 6. 



Oak Orchard creek, 28. 

 Oak Orchard swamp. 28. 

 Oneida conglomerate. 11. 

 ( )nondaga salt group, 27. 

 Orfhis flabellites, 19. 

 Orthoceras annulatum, 19. 



imbricatum, 19. 



trusitum, 2~. 



virgatum, 19. 

 Orthostrophia fasciata, 19. 

 Orthothctes cf. interstriatus, 30. 



subplanus, [9. 

 Oswego sandstone, : and Richmond 



beds, equivalency, 9. 

 Outcrops, deflection, 7. 



Pentamerus limestone, 14. 

 Pentamerus oblongus, 14. 

 Pholidops squamiformis, 19. 

 Phragmoceras parvum, 27. 

 Pittsford shale. 8, 28-30; fauna, 29, 



30. 

 Plectambonites transversalis, 19. 

 Poleumita crenulata, 27. 



scamnata, 2?, 26. 



sulcata, 2~. 



