TRENTON CONGLOMERATE OF RYSEDORPH HILL 



93 



Frequency and vertical range of species {continued) 





Gray 

 lime- 

 stone 



Redaish 

 gray 

 lime- 

 stone 



Black 

 lime- 

 stone 



N. Y. 



Canada 



West 



Other regions 



D. subaequata var. pervetus 

 Conrad . . .. 



c 



r 

 r 



c 

 c 

 r 







T? 



T 

 B-U 



B-T 

 B-T 



T 

 B-T 



Lo-B 



Lo-T 

 T 



Lo-T 



Lo-B 



B-T 

 T 



Lo-T 

 Lo-T 





Dinorthis pectinella Emmons 



SD 









Parastrophia hemiplicata Hall 



Protozyga exigua Hall 



Zygospira reeurvirostris Hall 

 Modiolopsis aviculoides Hall.. 







Baffin Land 







Lake Winnipeg 

















rr 

 rr 

 r 



r 



r 

 r 

 r 



T 



T ? 





Ctenodonta sp. indet... ....... 









C. cf astartaeformis Salter . . . 















Protowartbia cancellata Hall 



SD 







T-L 



T 

 T 



T 

 Lo 

 B-T 



Tbase 

 T 



Lo-T 



T-L 



Lo-T 



BR 





Conradella eompressa Conrad 



St) 



r 

 c 

 c 

 c 



r 





Carinaropsis carinata Hall 



Lopbospira bicincta Hall sp. .. 



L. perangulata Hall sp 



Liospira americana Billings sp. 



Clatbrospira subconica Hall. . . 



Trocbonema umbilicatum Hall 



SD 





Lo-T 

 Lo-T" 



Lo-T 



Lo 



Lo-T 







rr 



Baffin Land 



cc 

 c 



c 











Lo-L 

 Lo-T 



Lo-R 

 Lo-T 









Baffin Land 



Eccyliopterus spiralis sp. nov.. 





rr 

 rr 





Holopea paludiniformis Hall.. 

 Cyrtospira attenuata sp. nov... 



Conularia trentonensis Hall 



rr 

 rr 





T 





T 



















rr 



T 

 T 

 T 

 T 



T 



Lo-T 

 Lo-T 

 Lo-T 



T 



Lo-T 

 B-T 



B 





Spyroceras bilineatum Hall sp. 



Cyrtoceras subannulatum Hall 

 Zitteloceras ballianum d' Or- 



? 

 r 

 rr 





















rr 

 cc 



rr 

 cc 

 cc 





Tretaspis reticulata sp. nov. . . 







cf. Tretaspis 



Europe 



cf. Tretaspis 



Europe 



cf. Ampyx ros- 

 tratus Sars. of 

 Europe 



T. diademata sp. nov 













Ampyx (Lonchodomas) hasta- 





r 



r 



rr 



r 









Remopleurides linguatus sp. 

 nov 



rr 

 cc 









R. tumidulus sp. nov 



Gerasaphes ulrichana Clarke 











c 



B-L 



T-L 



T-R 



Lo-TT 

 T 



Lo 



Baffin Land 

 Europe 



Illaenus americanus Billings.. 

 Tbaleops ovata Conrad 



c 

 r 



c 



Lo-T 



T 

 Lo 



Baffin Land 

 Europe? 



Cyphaspis matutina sp. nov... 





r 



rr 

 rr 







Bronteus lanatua Billings 







T-L 



T 

 T 



T 

 T 



T 

 T-L 



T 



T-R 





Calymmene senaria Conrad... 









Pterygometopus eboraceus 

 Clarke 



r 

 c 



c 



c 



rr 

 c 

 cc 







P. callicepbalus Hall 



r 



c 



c 



T 



Lo-L 

 T 



Lo-T 



Lo-T 

 T 





Ceraurus piearexanthemus 

 Green sp 





Dalmanites achates Billings... 

 Spbaerocoryphe major sp. nov. 









r 



Lake Winnipeg ? 









Leperditia fabulites Conrad... 







Lo-T 



Lo-T ? 



Lo 





L. resplendens sp. nov 



c 



r 

 cc 







Isocbilina armata var. pygmaea 

 var. nov 



r 









Isoch. armata 



Schmidtella crassimarginata 

 var. ventrilabiata var. nov 











Lo-B of N. Y. 

 Sch. crassim Lo. 



Primitia mundula var. jonesi 





r 









in west 



