400 Forty-second Report on the State Museum. 





: in the 

 •berg. 



Oeiskany 

 Fauna. 



• in the 

 Lime- 





Also occurring 

 Lower Heldei 



Cumberland, 

 Maryland. 



New York. 



Cayuga, Can- 

 ada West. 



Also occurring 

 Corniferous 

 stone. 































* 



* 



* 











* 











* 



* 



























* 













* 













* 



* 



D. (Hausmannia) pleuroptyx, Green 



* 







* 



* 





* 

















* 

















* 











* 



* 



Calyinene platys, Greent 











* 











* 

















* Species marked by an * are given on the authority of Mr. Billings, 

 t Mr. Billings mentions G Blumenbachi Brongniart in the Oriskany of Canada West, 

 but in all probability the species is the G. platys. Green. 



In Volumes 3 and 6, Pal. N. Y., there have been described from the 

 Lower Helderberg group, 371 species, distributed among the 

 several classes as follows : 



Species. 



Crinoidea 18 



Cystoidea ... 5 



Pteropoda 4 



Brachiopoda 105 



Lamellibranchiata 35 



Gastropoda 67 



Cephalopoda 11 



Annelida 1 



Crustacea 24 



Corals and Bryozoa 101 



371 



Of these, fourteen, or three and three-quarters per cent are 

 known to pass upward into the Oriskany sandstone. 



In the preceding report I have called attention to the unfinished 

 work upon the Bryozoa which have formed the basis of 

 of Yolume VI and subsequently published papers, and to the large 

 collection of specimens still remaining unlabeled, and consequently 



