282 C. SCHUCHERT — LOWER HELDERBERG— ORISKANY FORMATIONS 



Table of the Helderbergian Fauna 





125 



> 



6 



03 



a 



H 



33 



1-^ 



523 



GO 



VJ3 



03 



C5 



Biachiopodu, 137 species. 

 Ziinqula centrilineata IIa.ll 



S 

 CS 



s 

 s 



X 













" perlata Mull 





' ' spathata Hull 





" arlemis Billings 



X 



'* lucrctia Billings 















X 



Orbiculoidea discus Hull. 17175 



SB 

 SB- 



s 



s 



B 



s 

 s 



X 





X 

 X 



. . . 



X 

 X 





" conradi (Hull). 





" n. sp. (Beecher collection) 



Schizomania (?) helderbergia Hull 



Pholidops ovata Hull. 27763 





Crania agaricina Hull and Clarke 





bella Billings 



X 



" pulchella Hall and Clarke. 27762 



t Orthis (Rhipidomella) oblata Hall. 4109, 10561, 



10565, 17174, 26033, 27765- 

 27768 



s 



SB 



s 







X 

 X 

 X 



X 



? 



X 



X 



X 

 X 

 X 

 X 



X 



X 



? 



X 



X 

 X 



X 



X 

 X 



X 

 X 



X 

 X 



X 



X 

 X 



X 



? 



X 





X 

 X 



X 



X 



X 



X 



X 





t " " oblata discus (Hall) . . 

 oblata emarginata (Hall). 

 7487, 27764. 27760. 





" " tubulostriata Hall 



s 

 s 



SB 



SB 

 SB 



s 



SB 



SB 



S 



s 





rminens Hall 





hssimilis Hall. 8419,26024.. 



" (Dalmanella) subcarindta Mall. 4114,10566, 



27773 



X 



f " planiconvexa (Flail). 



quadrans (Hall) 



t " " perelegans Hall. 27770-27772. . 



concinna Hull 



" {Schizophoria)multistriata Hull. 10567,26010 



(Syn. (). peduncularis Hull) 



" {Orlhostrophia) strophomenoides Hull. 10568, 



27774 



" (Bilobites) varica (Conrud). 4105, 83(57, 

 9355, 10564, 27774 













Leptseuisca concava (Hull). 27780 • 



adnascena Mall and Clurke. 27779 



tan gens Hull and Clarke. 



s 

 s 

 s 



CB 



s 



SB 

 B 



C 









X 

 X 



X 





* f Leptaena rfiomboidalis (Wilckens). 3760, 4235, 

 S421, 9121, 9228, 14770, 10576, 17170, 26011, 

 27776 27778 



X 



Strophomena (?) elongata Conrad 



t Stropeodonta beckii Mall. 10570, 17173, 27786, 



27787 



perplana (Conrud). 27788, 27789. . . 

 varistriata (Conrad). 10547,26047, 

 27790 



X 



