34 



NEW YORK STATE AlUSEUM 



Fucoides harlani, ii, 12. 

 Furnaceville iron ore, 8, 14. 



Gomphoceras sp., 19. 



Gray band of the Medina, 12. 



Greece, rock terrace, 6. 



Guelph fauna, 20, 21, 24, 25, 26; in 



Lockport dolomite, 8, 20, 25, 26 ; 



list of species found in vicinity of 



Rochester, 26-27. 

 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 on map, 6. 

 Homalonotus delphinocephalus, 19. 

 Hormotoma whiteavesi, 27. 

 Hudson River group, 9. 

 Hughmilleria, 29. 



socialis, 30. 

 var. robusta, 30. 

 Hydraulic cement made from Bertie 



waterlime, 2>^. 



Illaenus ioxus, 17, 19. 

 Inocaulis plumulosus, 19. 

 Irondequoit bay, 6, 7. 

 Irondequoit limestone, 8, 16-17. 



Kionoceras darwini, 27. 

 cf. medullare, 27. 



Latitude and longitude of region, 6. 

 Leperditia, 29. 



■ ^P; 27. 



balthica var. guelphica, 27. 

 scalaris, 31, 32. 



Leptaena rhomboidalis, 17, 19. 



Lewiston, Lockport dolomite, 6-7. 



Lichas boltoni, 19, 



Lingula, 29. 

 cuneata, 11. 

 lamellata, 19. 



Little Falls dolomite, thickness, 8. 



Lockport dolomite, 6, 8, 17; descrip- 

 tion, 19-27; fauna, 24; Guelph 



fauna, 8, 20, 25, 26 ; physical condi- 

 tions during late Lockport time, 

 25 ; thickness, 24. 



Lophospira bispiralis, 27. 



Lorraine shales, 9; thickness, 8. 



Lowville limestone, thickness, 8. 



Lyriopecten( ?) orbiculatus, 19. 



Macrochilina sp., 27. 



Magnesian limestone in Camillus 

 shale, 31. 



Manlius limestone, 7. 



Medina formation, 8 ; description, 10- 

 12; thickness, 10, 11; economic im- 

 portance, 12. 



Meristella, 31. 



Mississippian sea, strata laid down 

 in, ID. 



Mountain building, 9. 



Mytilarca eduliformis, 26. 



Niagara formation, 8, 17-27. 

 Niagaran group, 6. 



Oak Orchard creek, 28. 

 Oak Orchard swamp, 28. 

 Oneida conglomerate, 11. 

 Onondaga salt group, 27. 

 Orthis flabellites, 19. 

 Orthoceras annulatum, 19. 



imbricatum, 19. 



trusitum, 27. 



virgatum, 19. 

 Orthostrophia fasciata, 19. 

 Orthothetes cf. interstriatus, 30. 



subplanus, 19. 

 Oswego sandstone, 9 ; 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. 

 Plectambonitcs transversalis, 19. 

 Poleumita crenulata, 27. 



scamnata, 25, 26. 



sulcata, 27. 



