INDEX 



125 



Girty, G. H., on sponges and coelentrates 

 of Helderbergian, 84^. 



Glenerie, Oriskany fauna, 74^. 



Goniophora sp.? 35^ 



Grabau, A. W., study of Manlius lime- 

 stone of Erie county, 98^, 101^ 



Graptolites in the Helderbergian, 86'', 95^. 



Hederella arachnoidea, 61''. 

 explanation of plate, 120*. 

 flliformis, 62^ 

 graciliora, 61', 62^ 



explanation of plate, 120^. 

 magna, Ql\ 62*. 



explanation of plate, 120''. 

 ramea, 62^. 

 explanation of plate, 120*. 

 Helderbergian fauna, Devonic age, 82^- 

 101'; limits, 84'; Siluric characters, 84''- 

 86«; Devonic characters, 871-93*. 

 Hemitrypa columellata, 61^ 

 Hipparionyx proximus, 52^ 

 Homalonotus sp.? 26^ 



major, 26^. 

 Hjdrozoa, 64*. 



Isotrypa, 61^. 



Kayser, E., on Helderbergian faunas, 83^. 

 Kingston, Oriskany fauna, 73^. 



lamellibranchs, description of Oriskany 



species, 31*-37*; in the Helderbergian, 



853, 898^ 928, 942_ 

 Leptaena? nucleata, 51^ 



rhomboidalis, 15^, 54^, 57'. 

 Leptocoelia acutiplicata, 43^ 



Qabellites, 42M3'. 

 explanation of plate, 113^. 



Leptostrophia becki, 53*. 



cf. becki, 531 



blainvillii, 50^. 



magniflca, 53^. 

 explanation of plate, 117*. 



oriskania, 53'-54^. 



explanation of plate, 117*. 



perplana, 53^. 

 Lichas pustulosus, 25'. 



cf. pustulosus, 25'. 

 Lichenalia cf. crassa, 60*. 

 Lingula rectilatera, 59^. 



cf. rectilatera, 59''. 

 Logan, Sir William, on Gasp6 limestones, 



802, 818. 

 Lyriopecten sp.? 34^ 



Manlius limestone, fauna, 98M01'. 

 Mather, W. W., on geology of Becraft 



mountain, 6^-7^. 

 Megalanteris ovalis, 40^. 



explanation of plate, 112*. 

 Megambonia bellistriata, 35^. 



cardiiformis, 35''. 



crenistriata, 35*, 36^. 

 explanation of plate, 111^ 



lamellosa, 31^ 

 Meristella cf. laevis, 45*. 



lata, 453. 



lenta, 44^. 



lentifo-rmis, 44^-45^. 

 explanation of plate, 114*. 



(Pentagonia) unisulcata, 44*. 



(?) vascularia, 45*-462. 

 explanation of plate, 114*. 

 Metaplasia pyxidata, 48'. 

 Monotrypella arbusculuB, 64*. 



