ILLUSTRATIONS 



XllI 



Page 

 Hopkins : 



Figure 6 — Close view of Mud Buttes 425 



" 7 — Close view of Mud Buttes 425 



:' 8 — Near view of Mud Buttes 427 



9 — Near view of Mud Buttes 427 



" 10 — Development of structure of Mud Buttes 427 



BOWEN AND AUROUSSEAU : 



Figure 1 — Core barrel from Montezuma well number 1 432 



" 2 — Thin-section of fused core, Montezuma well number 1 . . 434 



" 3 — Micrographs of steel from core barrel 439 



VON HuENE : 



Figure 1 — New restoration of Megalosaurus (SU'eptospondylus) 



cuvieri 452 



" 2 — New restoration of Compsognathus longipes 454 



" 3 — Genetic scheme 456 



VON HUENE : 



Figure 1 — Dicynodon sollasi Broom, right side 460 



" 2 — Dicynodon sollasi Broom, from below 461 



VON HUENE : 



Figure 1 — New restoration of the skull of Mesosaurus hraziliensis 



from the Permian of Irah, Brazil 464 



" 2 — Scheme of the phylogenetic development of the Ichthy- 



opterygia 466 



Todd : 



Figure 1 — Map of North Dakota 471 



2— Map of South Dakota 477 



" 3 — Bijou Hills and gorge of the Missouri 480 



" 4 — View of East Bijou Hill, part of West Bijou, and the 



gap between 481 



" 5 — Panoramic view of the lower Cheyenne River, looking 



southwest from the upland north of the mouth 482 



" 6 — View of portion of bouldery margin of Lake Arikaree, 



with Virgin Butte in the background 485 



Patton : 



Figure 1 — Part of general section in which transition bed occurs. 496 



" 2 — Contact of Timpas limestone and Carlile shale 498 



Chad WICK : 



Figure 1 — Evolution of the Laurentian Great Lakes during ice 



waning 506 



Stose and Jonas : 



Figure 1 — Geologic map of northwestern part of the Piedmont 



province of Pennsylvania and Maryland 508 



" 2 — Limestone conglomerate at base of Conestoga limestone 



unconformable on Ledger dolomite 511 



" 3 — Unconformable contact of limestone conglomerate con- 

 taining subangular blocks of white marble at base of 

 Conestoga limestone on Ledger dolomite 511 



