182 



SHIMER AND GRABAU — HAMILTON GROUP OF THEDFORD 





Thedford Region. 



Eighteen-mile 

 Creek. 







i 



d q) 



si 

 ■gs 



o 

 W 



of 



03-" 



o 



-a 



a> 



a 



'u 



o 



d 



a> 

 >> . 



C5 CO 



03 



— -a 

 c« 



o 

 o 



of 



03 



CQ ^ 

 OJ 



.5 » 

 a, 



■PH 03 



03 d 



© 



,d 



02 

 Fh 



03 



O 



►J 



03 



a 



P 



C 



m 



w 

 03 



'cS 

 ,C 



03 

 & 



o 

 o 



o 



03 

 03 



O 



53. Qrthonota parvula Hall 





s 











R 









Brachiopoda : 



54. Lingula ligea Hall 



55. L. thedfordensis Whiteaves 



56. Orbiculoidea doria (Hall) 



W 



w 





















? 











r 





57. Crania cranistriata (Hall) 







R 

 R 

 R 

 r 

 c 





— 



r 

 r 

 c 

 c 

 C 

 C 

 r 

 c 

 c 







58. Craniella hamiltonise (Hall) 









r 

 R 

 r 



r 

 c 



re 





59. Pholidops hamiltonix Hall 











60. Stropheodonta concava Hall 









R 

 ? 



R 



c 

 cf. 





61 . S. demissa (Conr.) 



62. S. inequistriata (Conr. ) 



63. S. pUcata Hall 



"w 

 w 



R 





f 













64 Pholidostrophia iowaensis (Owen) .... 



R 





c 

 r 



r 

 R 



r 

 R 



re 

 re 



c 





65. Leptostrophia perplana (Conr.) 







66. Leptxna rhomboidalis (Wilckins) 



67. OrtJiothetes anomalus (Winchell) 



w 













S 















68. arctostriatus Hall 





s 





cf 



R 

 r 



c 

 r 

 re 



C 





r 







w 

 w 









70. Chonetes coronata Conrad 











re 



re 





71. Ch. lepida Hall 







c 



c 



c 





72. Ch. lineata Conr 





Cn 







73. Ch. setigera Hall 



74 Ch scitula Hall 



w 











r 



C 

 r 



C 









c 

 C 







r 

 r 





r 

 r 



r 

 C 





75. Ch. vicina (Castelneau) 







"s" 





76. Strophalosia radicans (A. Winch.) .... 



77. St. truncata f (Hall) 



78. Productella productoides (Murch.) .... 



"w 









g 







cf 

 c 

 R 













79. Rhipidomella penelope Hall 





? 

 ? 

 R 



R 

 R 







c 



C 



r 





80. Rhipidomella vanuxemi Hall 



81. Pentamerella pavilionensis Hall 

















82. Gypidula Ixviuscula Hall 







S 



s 



r 



? 

 r 

 c 















83. Camarotozchia sappho (Hall) 













c 



re 







84. C. thedfordensis Whiteaves 















85. C. horsfordi (Hall) 













r 

 ? 

 C 



r 



r 



"6 





86. Trigeria lepida Hall 















87. Leiorhynchus laura (Bill.) 







C 



r 

 C 



R 





88. L. huronensis Nich 









89. L. iris Hall 



w 

 w 



















90. Pugnax kernahani Whiteaves 



91. Cyclorhina nobilis Hall 

























R 



r 



S 















92. Eunella attenuata Whiteaves 





















93. E. harmonia Hall 





















94. E. simulator Hall 



w 



















95. Cransena romingeri Hall 







S 

 c 







re 

 c 

 c 









96. Tropidoleptus carinatus Hall 







R 





r' 



C 



c 

 C 

 c 





97. Atrypa reticularis (Linn.) 









98. A. spinosa Hall 



w 









99. Spirifer audacula (Conr.) 





R 

 R 









c 



re 





100. S. divaricata Hall 















101. S. euryteines Owen 



102. S. granulosa (Conr.) 



w 

 w 

























.... 





C 



C 







