358 Forty-second Report on the State Museum. 



same animal. The following fifty-two species constitute 

 present known Crustacean fauna of this formation : 



the 



Trilobita. 



Calymene platys. 

 Phacops cristata. 

 Phacops cristata, var. pipa. 

 [?] Phacops rana. 



Dalmanites(Hausmannia)xjleuroptyx 

 Dalmanites(Hausmannia) concinnus. 

 Dalmanites (Hausmannia) concinnus 



var. serrula. 

 Dalmanites (Hausmannia) phacoptyx 

 Dalmanites (Coronuva) aspectans. 

 Dalmanites (Coronura) myrmeco- 



phorus. 

 Dalmanites (Cryphceus) comis. 

 ['?] Dalmanites {Cryphceus) Boothi. 

 Dalmanites (Odontocephalus) sele- 



nurus. 



Dalmanites (Odontocephalus) bifidus. 

 Dalmanites ( Odontocephalus) JEgeria. 

 Dalmanites (Odontocephalus) coro- 

 natus. 



Dalmanites (Corycexjhalus) pygmceus 

 Dalmanites (Chasmops) anchiops. 

 Dalmanites (Chasmops) anchiops, 



var. armatus. 

 Dalmanites (Chasmops) Calypso. 

 Dalmanites (Chasmojjs) Erina. 

 Dalmanites (Chasmops ?) macrops. 

 Acidaspis callicera. 

 Acidaspis sp. 



Of these species one occurs in the Lower Helderberg group, viz. : 

 Dalmanites (Hausmannia) pleuroptyx; three in the Oriskany sand- 

 stone, viz. : Phacops cristata, Dalmanites (Hausmannia) pleuroptijx 

 and Dalmanites (Chasmops) anchiops ;* and eleven in the Schoharie 

 grit, viz. : 



Lichas (Terataspis) grandis. 

 Lichas (Conolichas) hispidus. 

 Lichas (Conolichas) Eriopis. 

 Lichas (Hoplolichas) hylwus. 

 Lichas (Arges) contusus. 

 Lichas (Ceratolichas) gryps. 

 Lichas (Ceratolichas) dracon. 

 Proetus crassimarginatus. 

 Proetus folliceps. 

 Proetus clarus. 

 Proetus canaliculatus. 

 Proetus Verneuili. 

 Proetus microgemma. 

 Proetus stenopyge. 

 Proetus ovifrons. 

 Proetus delphinulus. 

 Proetus (?) planimarginatus. 

 Proetus tumidus. 

 Phaethonides arenicolus. 

 Phaethonides varicella. 

 Phaethonides gemmaeus. 

 Cyphaspis minuscula. 

 Cyphasjns s tephanophor-a. 

 Cyphaspis diadema. 

 Cyphaspis hybrida. 



ClRRIPEDIA. 



Palceocreusia Devoniaca. 

 Ti / rr i lepas flexuosus. 

 Turrilepas cancellatus. 



Calymene platys. 

 Phacops cristata. 



Dalmanites (Hausman nia) concinnus. 

 Dalmanites (Chasmops) anchiops. 

 Dalmanites ( Chasmops) anchiops, var. 

 armatus. 



Acidaspis callicera. 

 Lichas (Terataspis) grandis. 

 Lichas (Conolichas) hispidus. 

 Proetus crassimarginatus. 

 Phaethonides arenicolus. 

 Cyphaspis min uscula. 



But a single characteristic species of this fauna ranges upward 



into the Hamilton beds, viz. : Phaethonides gemmmis. 



*The examination of a later collection of fossils of the Oriskany Sandstone from 

 Caynga, Ontario, shows the occurrence of Dalmanites (Chasmops) anchiops, Green, 

 U. {Hausmannia) pleuroptyx. Green. Ilomalonotus Vanuxemi, Hall, //. major, Whitfield, 

 Phacops a'istata, Hall, Proetus crassimarginatus, Hall, Calymene platys, Green, Fish spine. 



