Maryland Geological Survey 



107 



Geological Range of Middle Devonian Species in Maryland and New York. — Continued. 





MARi'L-iND 



New York 



SPECIES 



c 



'S 



O 



Q 

 If 



3 



Middle 

 Devonian 

 Romney 



Upper Devonian 

 Jennings 



C 



o 

 > 



Q 

 o 



Middle 

 Devonian 



Upper 

 Devonian 



e 

 s 



— 



s 



a 

 O 



a* 

 o 



E 



c 

 o 



£ 



S 

 OJ 



Is 



II 



OJ 



s 



OJ 



>:« 



rid 



u 



a 



a. 



B 



0) 



B 



CD 

 O 



o 



5 



5 





5 



ffl 



a; 



c 



a; 



O 



Portage 



be 

 g 



S 

 a; 



O 



a; 



.a 



J3 



"a; 

 c 



fa 

 P. 



3 

 fa 

 o 



MOLUJSCA-PELECYPODA.— Continued. 



Nnculites oblongatus Conrad 



N'uculites triQueter Conrad 









* 



•• 





't 



* 



* 



•• 





■* 





t 



* 



* 

 * 





* 

 * 



* 



* 



* 



w 



■* 



Niiculites grabaui Prosser 





Palseoneilo constricta (Conrad) 



Palajoneilo plana HaJl 



Pateoneilo maxima (Conrad) (?) 



Pal^oneilo fecunda Hall 



Palrronfilo perplana var. grabaui Prosser 



I'ateont'ilo emarginata (Conrad) 



Paheont'ilo teniiistriata Hall (?) 



Pal.Toneilo clarkei Prasser 



Pala?oneilo rowel Prosser 



PalLPoneilo marvlandica Prosser 



Tancrediopsis clarkei Pios=«r 



Leda diversa Hall 



Lcda rostellata (Conrad) 



Parallelodon hamiltoniee (Hall) 



Pterinea flabellum (Conrad) 



Liopteria cf . conradi Hall 





Leptodesma ros'ersi Hall 



Mytilarca (Plethomytilns) oviformis (Conrad) 



Oonocardium normale Hall 



Conocardiiim cmnberlandise Swartz 



.\ctinopteria decussata Hall 



Actinopteria boydi var. gibbosa Prosser 



Actinopteria sp 



Modiella pygmsa (CJonrad) 



Nyassa argiita Hall (?) 



A\'ieiiIopecten prinoeps (Conrad) 



Avieiilopecfen eqiiilatera (Hall) 



j Modiomorpha eonecnl lira (Conrad) 



1 Mod i,,iii(.i'i ilia siilialala (Conrad) 



Mo,liMiii.ir|,],a iiiyiilni.lcs (Conrad) (?) 



(Jiiiiii.filiMrH liaiiiillniirnsis Hall 



Pill ila.lrlhi radiata fConrad) 



CxiMiianlilla bellistriata (Conrad) 



( yiHiiarililla teniiistriata (Hall) 



(^A'l^ricardinia inden+a (Conrad) 



Paraoyclas lirata Conrad 



Paracyclas tenuis Hall 



Pala-osolen minutus Prosser 



MOLLUSCA-GASTROPODA. 



Pleurotomaria (Bembexia) suloomarginata CJonrad. 



Pleurotomaria (Gyroma) eapillaria Conrad 



Plein-otoinaria (Trepospira) rotalia Hall (?) 



PI.Mirotoiuaiia (lairx/.one) itvs Hall (?) 



Bellrriiiilii III ( liiu anoiwis) leda Hall 



Bullenii.Iioii (PateDii-^tium) patulus Hall (?) 



G.vrtolites (Cvrtonella) niitella Hall 





t = related form. 



