288 C. SCHUCHERT — LOWER HELDERBERG-ORISKANY FORMATIONS 



Table of the Helderbergian Fauna 





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6 

 & 



a 



93 



53 



53 



C 



Hi 





5 

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Q* 

 99 

 93 



CD 



Crustacea, 51 species. 



Primitia mundula var. Jones (cape Bon Ami) 



" sequalw Jones and Hall (cape Bon Ami). . 

 Bythocypris oviformis Jones (J)S. Penn.) 



S 

 S 



s 



s 



s 

 s 



s 

 s 

 s 

 c 

 c 



s 

 s 



c 









X 





yl'j-lnnina, 2 n. sp. (Beecher collection) 





Leperditia hudsonica Hall 





i( mbquadrata Jones (DS. Penn.) 





labrosa Jones (cape Bon Ami) 





Beecherella carinata Ulrich 





" subtn hi 'aJa Ulrich 





subtumida intermedia Ulrich 





" oval a Ulrich 





11 cristata Ulrich 





" navicula Ulrich 





" angularis Ulrich 





Bcyrichia granulala Hall 





" oculina Hall 





arcuata (Bean) (cape Bon Ami) 



*Kkedenia acadica (cape Bon Ami) 





* " notata (Hall). 10551, 10552 





notata ventricosa Hall 





pennsylvanica Jones. (DS. Penn.). . . . 

 Bronteus barrandei Hall 





" pomp'dius Billings 





* canadensis Logan 













X 



Prcetus proluberans Hall. 4822. 



c 









X 



X 

 X 

 X 



\ 



X 





" Junius Billings 











t Hbmalonotus vanuxemi Hall 



SB 

















Cardan ia cyclwrus (Hall and Clarke) 



s 













maerobius (Billings) 





Cyphaspis ccelebes Hall and Clarke 



s 

 s 

 s 



X 





X 



X 





n. sp. (Beecher collection) 





Pkaeops logani Hall. 10631 , 14774, 27849 



" traganus Billings 



X 



" hudsonicus Hall. 27850, 27851 



s 



CB 

 CB 



s 

 s 







X 



X 

 X 





| Dalmanites ( Odontoc1i.de) pleuroptyx (Green). 4231, 

 5002, 5003, 4958, 10630, 14775, 25992, 

 25994 



. . . . 



X 

 X 





X 



" (O.) micrurus (Green). 4946, 27852, 

 27853 . 



X 



X 





( Odantocephahis) n. sp 





11 (Ptobolium) tridens (Hall) 





" tridentiferns (Slmmard). . • • 





" " namtus (Conrad). 4150, 

 4803, 4934 



S 1', 

 SB 







(Corycephalw) dentaius (Barrett) 



epicratis Billings 





2 n. sp. (Beecher collection) 



s 













