INDEX 



125 



Girty, G. H., on sponges and coelentrates 

 of Helderbergian, 84 2 . 



Glenerie, Oriskany fauna, 74 7 . 



Goniopkora sp.? 3o 5 . 



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

 stone of Erie county, 98 s , 101 3 . 



Graptolites in tke Helderbergian, 86 7 , 93 4 . 



Hederella aracbnoidea, 61 7 . 

 explanation of plate, 120 9 . 

 filiformis, G2 3 . 

 graciliora, CI 9 , 62 3 . 



explanation of plate, 120 7 . 

 magna, 61 4 , 02 4 . 



explanation of plate, 120 7 . 

 ramea, 62 1 . 

 explanation of plate, 120 6 . 

 Helderbergian fauna, Devonic age, 82 3 - 

 101 9 ; limits, 84 6 ; Siluric characters, 84 7 - 

 86 9 ; Devonic characters, 87 1 -93 6 . 

 Hemitrypa columellata, 61 3 . 

 Hipparionyx proximus, 52 6 . 

 Homalonotus sp.? 26 1 . 



major, 26 2 . 

 Hydrozoa, 64 6 . 



Isotrypa, 61 1 . 



Kayser, E., on Helderbergian faunas, S3 3 . 

 Kingston, Oriskany fauna, 78*. 



Lamellibranchs, description of Oriskany 



species, 31 4 -37 9 ; in the Helderbergian, 



85 3 , 89 6 , 92 s , 94 2 . 

 Leptaena? nucleata, 51 6 . 



rhomboidalis, 15 1 , 54 5 , 57 6 . 

 Leptocoelia acutiplicata, 43 2 . 



flabellites, 42 7 -43 3 . 

 explanation of plate, 113 s . 



Leptostrophia becki, 53 6 . 



cf. becki, 53 7 . 



blainvillii, of) 5 . 



magnifica, 53 3 . 



explanation of plate, 117 6 . 



oriskania, 53 6 -54 s . 

 explanation of plate, 117 4 . 



perplana, 53 7 . 

 Lichas pustulosus, 25 9 . 



cf. pustulosus, 25 9 . 

 Lichenalia cf. crassa, 60 fi . 

 Lingula rectilatera, 59 7 . 



cf. rectilatera, 59 7 . 

 Logan, Sir William, on Gaspd limestones, 



80 2 , 81 s . 

 Lyriopecten sp. ? 34 5 . 



Manlius limestone, fauna, 9S 5 -101 9 . 

 Mather, W. W., on geology of Becraft 



mountain, 6 8 -7 2 . 

 Megalanteris ovalis, 40 1 . 



explanation of plate, 112 3 . 

 Megambonia bellistriata, 35 7 . 



cardiiformis, 35 7 . 



crenistriata, 3o 6 , 36 2 . 

 explanation of plate, 111 1 . 



lamellosa, 31 4 . 

 Meristella cf. laevis, 45 3 . 



lata, 45 3 . 



lenta, 44 1 . 



lentiformis, 44 1 -45 2 . 

 explanation of plate, 114 4 . 



(Pentagonia) unisulcata, 44 4 . 



(?) vascularia, 45 5 -46 2 . 

 explanation of plate, 114 6 . 

 Metaplasia pyxidata, 48 7 . 

 Monotrypeila arbusculus, 64 4 . 



