130 



The Lower Devonian Deposits of Maryland 







Maryland 



New Jersey 



New York 





Ke 



Helderbe 



CO 



1 



i 



i 



1 



o 



ii 



1 



1 

 1 



1 



1 



1 



1 



1 



1 



1 



1 



6 



1 



1 



1 

 1 



f 



1 



^ 





SPECIES S 



h 



i 



ill! 



s 



a 



1 



^ 



1 



1 



1 



1 



1 



I 



1 

 1 



1 

 1 



^ 



a 



294 

 2i».'i 



JfOLLUSCA— GASTROPODA. 



Pleurotomaria labrosa Hall 



Bellerophon cf auriculatus Hall 







V 



] t 

 . t 

 . t 



.' t 



;; 





;; 









1 

 1 





*■ 



■■ 







•*• 





V 



V 





__ 



■■ 



296 









297 





298 









:■ 











300 





301 



Holopea ? sp ..... 







309 



















304 



Platyceras gebhardi Conrad • . • • j • 



.. .. * 











•• --I'-i-- •■ 



::i:: 













.... 



307 













308 



310 

 311 

 312 

 313 















1: 



.. 



Platyceras reflexum HaJl 



.. .. * 







'.'.W'.'. 























Platyceras trilobatum Hall ? L. ..!• 



Platvoeras tenuiliratum Hill ' '..... 



.. .. * 







314 













.' + 

 . t 



• ■ 



;• 





V 



V 



■*■ 





.. ::!•. 











* 













316 







.. ..|.. 



..j.. 



::i:: 



'.':\'.'. 

 '.'.\'.'. 



317 



Platyceras spirale Hall | . . . . ! . 



.. .. • 

















::|:: ::;: 



320 





















.. '.'. 



-. 



* 



■■ 



322 



Strophostylus matheri Hall 











.. !.. 



;; 



" 



*■ 



V 



;; 

 :: 



S^S 













Diaphorostoma ventricosum (Conrad) 



Diaphorostoma depressum (Hall) 



•• •• * 







325 







326 





'.'. * 



327 







•*• 



328 



Tentaculites ' acus Clarke 



'.'.\'* " 



329 







330 

 331 



Tentaculites elonpatiis Hall 



Tentaculites gyracanthus (Eaton) * » * 



.. » * 







Ji;- 



1 

 1! 



•■ 



* 



* •• 



332 



MOLLUSGA— CEPHALOPODA. 







.*.: 



••1 











333 











•■1 







334 





:: ;;i;: 



335 





.. t 







" 



* 













■■ 







i 











336 



ARTHROPODA— TRH-OBITA 









.. 





337 

 338 



Proetiis cf. protuberans Hall 



















t . 





V 













n 









■*■ 











340 



Calvmene camerata Conrad * * . 







* ' V 







:.■.. ..1 



restricted to Maryland. 



