264 



Field Columbian Museum — Geology, Vol. II. 



3 



BRACHIOPODA— Con. 



Crania crenistriata Ha// 



Craniella hamiltoniae Hall ...... 



Cryptonella planirostris Hall .... 



C. rectirostris Hall 



Cyclorhina nobilis Hall 



Cyrtina hamiltonensis Hall 



C. hamiltonensis recta Hall 



Delthyris consobrina d'Orb 



D. sculptilis Hall 



Eunella lincklaeni Hall 



Leiorhynchus dubium Hall 



L. laura Billings 



Lingula sp 



Meristella barrisi Hall 



M. haskinsi Hall 



Nucleospira concinna Hall 



Orthothetes arctostriatus Hall . . 



O. chemungensis Conrad 



Parazyga hirsuta Hall 



Pholidostrophia iowaensis Owen. 

 Productella spinulicosta Hall . . . 

 Reticularia fimbria ta Conrad .... 



Rhipidomella leucosia Hall 



R. penelope Hall 



R. vanuxemi Hall . 



Roemerella grandis Vanuxem .... 



Spirifer acuminatus Conrad 



S. angustus Hall 



S. audaculus Conrad 



S. audaculus macronotus Hall. 



S. divarioatus Hall 



S. granulosus Conrad 



S. granulosus clintoni Hall 



S. marcyi Hall 



S. pennatus Atwater 



Stropheodonta concava Hall. . . . 



S. demissa Conrad 



S. inaequistriata Conrad 



S. perplana Conrad 



S. plicata Hall 



S. textilis Hall 



S. sp 



Terebratula sp 



Tropidoleptus carina tus Conrad. . 



PELECYPODA 



Actinopteria boydi Conrad 



A. decussata Hall 



Aviculopecten princeps Conrad. . 

 Conocardium eboraceum Hall. . 

 Cypricardella bellistriata Conrad 



Elymella nuculoides Hall 



Goniophora hamiltonensis Hall. . 



Grammy sia arcuata Conrad 



Leiopteria Conradi Hall 



Modiomorpha concentrica Conrad 



H 

 M-H 

 EH 



H 



M-H 

 H 

 M 

 E 



H 

 M-H 



E 

 M-H 

 M-H 

 M-H 



EH 



M-H 

 EH 



M-H 

 EH 

 EH 

 M-H 

 M-H 

 H 



HE 

 H 



EH 

 EH 



H 

 H 



