128 



The Lower Devonian Deposits of Maryland 



SPECIES 



Maryland 



New Jersey 



New York 



1 



Helderberg 



i 



1 

 o 



1 



1 



1 

 1 



1 



1 



i 



1 



1 

 1 



e 



1 



5 



1 



1 



tc 



o 



1 



1 

 < 



Keyser 



g 



>> 



6 



1 



1 





■s 

 .s 



i 

 1 



1 



1 



i 



6 



i 



■a 



1 



1 

 c 





_>•. 



is 



1 



:: 





1 



1 



1 



1 



.2 



1 



1 



1 



1 



1 



^ 



2 



1 



MOLLUSCOIDEA—BRACHIOPODA.— Cont'd. 













* 









t 



+ 

 t 



:: 



t 



t 



t 



.'. 



t 



t 

 * 



t 



;; 

 t 



:: 

 :: 



;; 



:: 





•* 



•* 



'■^ 









*• 



'■'■ 

 ■■ 



■■ 



V 



:: 











Eatonia whitfieldi Hall 























* 



* 





* 















Eatonja hartlevi Sehuchert 

































: 



* 

 t 

 + 





" 



Renssela;ria mutabiJis (Hall) 







+ 













Renssela'ria subprlobosa Weller ! . - 







Rensselieria subgrlobosa var. avus Sehuchert.... 

 RerL3sela:ria subg-lobosa var. crassa Sehuchert. . 



































Rensselajria marylandica var. symmetrica 

 Sehuchert 

























tl..l.. 

 t ..!.. 









■■ 



t 



'.'.\'.'. 



Rensselffiria (Beachia) proavita Sehuchert 





Rensselffiria (Beachia) cumberlandiae (Hall) .... 



Rensselsria (Beaehia) suessana (Hall) 



Rensselsria (Beaehia) suessana var. immattira 













'■'■ 

 ■*■ 



: 



Rensselsria (Beaehia) ovalis (Hall) 





























































t 







* 



* 









Atrypa ? biconvexa Maynard 



Atrypina imbricata (Hall). ... 



























Spirifer cumberlandise Hall 

















t 

 + 





'.'. 











t 



Spirifer modestus var. plicatus MajTiard 









"\" 



Spirifer paucicostatus Sehuchert 





Spirifer vanuxemi Hall 





* 



* 





•,• 











Spirifer vanuxemi var. pro,?nosticus Sehuchert. 

 Spirifer eriensis Graba\i 



- 



v 

















Spirifer annularis Sehuchert 



























































Spirifer murehisoni var. marylandicus Schuch- 





















Spirifer hartleyi Sehuchert 





















Spirifer perdewi Sehuchert 







































t 





















































Sfiiifpr frordoni Sehuchert 





















Itrlifularia bicostata (Vanuxeni).. 





* 









* 







.. 



Amhocnelia umbonata (Conrad) ? 





t = restricted to Maryland. 



AfTine = related species. 



