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Lan) 
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SO MPNAnUHR YD 
ILLUSTRATIONS 
PLATES 
(All plates following page 79.) 
Lingula, Derbyia, Paeckelmannia, Meckella, Chonetinella, Rhipidomella, 
Crurithyris, Chonetes, and Leptodus?. 
Alexenia?, Krotovia, and Avonia. 
Antiquatonia and Proboscidella?. 
Kochiproductus and Waagenoconcha. 
Muirwoodia, Marginifera?, and Antiquatoma. 
Anidanthus, Marginifera?, and Linoproductus. 
Probolionia, Marginifera?, and Pleurohorridonia?. 
Krotovia, Probolionia, and Echinoconchus. 
Rhynchopora and Stenoscisma. 
Dielasma?, Wellerella, Krotovia, Rhynchopora, Stenoscisma, and Squa- 
mularia. 
. Spiriferella, Punctospirifer, and Cleiothyridina. 
12. 
Rostranteris, Dielasma, Hustedia, Spiriferellina, and Pseudomartinia. 
FIGURES 
Page 
Map of Grindstone-Twelvemile Creeks area, central Oregon, 
showing distribution of Permian rocks and localities from 
which brachiopods werentalkene sities eee cers ierter eine 3 
Longitudinal sections of productoid genera...........eseeeeeeees 28 
iv 
