INDEX 



123 



Chonetes cf. arcuata, UK 

 complanatus, 50^. 

 dawsoni, 50^ 

 hudsonlca, 49^-50^ 



explanation of plate, 116^ 

 melonica, 50^. 

 Chonophyllum, 15^ 

 Chonostrophia complanata, 50^-51*. 

 explanation of plate, 116^ 

 helderbergia, 51^. 

 reversa, 51^. 

 Cirripeds, 26^. 

 Cladopora smicra, 63^. 



explanation of plate, 120^ 

 styphelia, 63^, 64}. 

 explanation of plate, 120^ 

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

 fauna, 6^; previous study on age of 

 Helderbergian, 83*. 

 Coelospira Camilla, 42*. 

 cf. Camilla, 14^, 

 concava, 42^. 



explanation of plate, 113^ 

 dichotoma, 42^. 

 explanation of plate, 113^. 

 Coenograptus gracilis, 7^. 

 Coleolus sp.? 281. 

 Conocardium concinnum, 37^. 

 cuneus var. nasutum, 37'. 

 inceptum, 37^ 

 explanation of plate, 111*. 

 Conodonts, 26*. 

 Conularia desiderata, 28°. 



cf. desiderata, 28^. 

 Corals in the Helderbergian, 86*, 92^, 95^ 



Cordania becraftensis, 228-242. 

 explanation of plate, lOG^. 

 cyclurus, 23^-242. 

 hudsonica, 24^. 

 explanation of plate, 106^ 

 Cornulites, 28*. 

 cingulatus, 27^ 

 explanation of plate, 107^. 

 Corycephalus regalis, 17*, 18*. 

 Crania bella, 58«. 

 cf. bella, 58^-59^ 



explanation of plate, 119^. 

 pulchella, 58*. 

 explanation of plate, 118^ 

 Crinoidea, description of Oriskany species, 

 625; jn tjjg Helderbergian, 86*, 91^, 95^. 

 Cryptouella, 39^ 

 (?) fausta, 385-395. 

 explanation of plate, 112^. 

 Cyphaspis coelebs, 24^ 

 minuscula, 245. 

 explanation of plate, 106*. 

 Cypricardinia indenta, 36^ 

 explanation of plate, 111^. 

 lamellosa, 365. 

 cf. lamellosa, 36*. 

 planulata, 36*. 

 Cyrtina dalmani, 49^. 

 cf. dalmani, 49^. 

 rostrata, 49^. 

 varia, 49^. 



explanation of plate, 114*. 

 Cyrtolites expansus, 28^-29*. 



explanation of plate, 108^-9^. 

 Cystids in the Helderbergian, 865, 952 



