INDEX 



123 



Chonetes cf. arcuata, 14 2 . 



complanatus, 50 7 . 



dawsoni, 50 6 . 



hudsonica, 49 6 -50 6 . 

 explanation of plate, 116 1 . 



melonica, 50 4 . 

 Chonophyllum, 15 1 . 

 Chonostrophia complanata, 50 6 -51 4 . 

 explanation of plate, 116 s . 



helderbergia, 51 3 . 



reversa, 51 3 . 

 Cirripeds, 26 s . 

 Cladopora smicra, 63 7 . 



explanation of plate, 120 3 . 



styphelia, 63 9 , 64 1 . 



explanation of plate, 120 1 . 

 Clarke, J. M., list of species of Oriskany 



fauna, 6 9 ; previous study on age of 



Helderbergian, 83 4 . 

 Coelospira Camilla, 42 4 . 



cf. Camilla, 14 2 . 



concava, 42 1 . 

 explanation of plate, 113 1 . 



dichotoma, 42 6 . 



explanation of plate, 113 3 . 

 Coenograptus gracilis, 7 8 . 

 Coleolussp.728 1 . 

 Conocardium concinnum, 37 7 . 



cuneus var. nasutum, 37 7 . 



inceptum, 37 1 . 



explanation of plate, 111 4 . 

 Conodonts, 26 4 . 

 Conularia desiderata, 28 6 . 



cf . desiderata, 28 6 . 

 Corals in the Helderbergian, 86 6 , 92 s , 95 3 . 



Cordania becraftensis, 22 8 -24 2 . 

 explanation of plate, 10G 2 . 

 cyclurus, 23 8 -24 2 . 

 hudsonica, 24 2 . 



explanation of plate, 10G 1 . 

 Cornulites, 28 4 . 

 cingulatus, 27 3 . 



explanation of plate, 107 2 . 

 Corycephalus regalis, 17 4 , 18 6 . 

 Crania bella, 58 s . 

 cf. bella, 58 7 -59 2 . 



explanation of plate, 119 1 . 

 pulchella, 58 4 . 



explanation of plate, 118 9 . 

 Crinoidea, description of Oriskany species, 

 62 5 ; in the Helderbergian, ,86 4 , 91 9 , 95 1 . 

 Cryptonella, 39 5 . 

 (?) fausta, 38 5 -39 5 . 



explanation of plate, 112 1 . 

 Cyphaspis coelebs, 24 6 . 

 minuscula, 24 5 . 



explanation of plate, 106 4 . 

 Cypricardinia indenta, 36 3 . 



explanation of plate, 111 2 , 

 lamellosa, 36 B . 

 cf. lamellosa, 36 4 . 

 planulata, 36 4 . 

 Cyrtina dalmaui, 49 2 . 

 cf. dalmani, 49 1 . 

 rostrata, 49 1 . 

 varia, 49 1 . 



explanation of plate, 114 s . 

 Cyrtolites expansus, 28 8 -29 4 . 



explanation of plate, 108 8 -9 2 . 

 Cystids in the Helderbergian, 86 5 , 95 2 . 



