150 



The Bad! and Formations of the Black Htills Region 



Page 



Pennington county 13, 62 



Perchoerus. . 105, 106, 128, 129 



Perissodactyla 75 



124, 127, 129, 131', 133 



Peterson, O. A 20 



41, 42, 44, 53, 80, 84, 86 



87, 88, 91, 96, 104, 105, 109 



110, 115, 117, 121, 142, 143 



Phenacocoelus 109, 132 



Philadelphia Academy of Sci- 

 ences. (See Academy of 

 Natural Sciences of Phila- 

 delphia.) 



Phosphate . 6 6 



Physiographic development 61-64 



Piedmont plain 57 



Pigtf 106 



Pine Ridge 21 



22, 34, 36, 38, 39, 40, 61, 62 

 Pine Ridige Indian reserva- 

 tion 42, 46, 62, 63, 118 



Pinnipedia ...'... 76 



Pleistocene 12, 115 



Pliocene , 12 



22, 23, 24, 25, 94, 108 



Pocket gophers 88 



Poebrotherium . .. 115, 116, 128 



Porcupine butte 34, 42, 62 



Porcupine creek 42, 62 



Potamotherium 84, 133 



Princeton University 19 



20, 77, 103, 121 



Private collectors 20' 



Proboscidea 75, 131 



Procamelus...... 115, 117, 133 



Procamelus zone 26 



Promerycochoerus 109, 110, 132 



Promerycochoerus zone.. 2 6, 41 



Prosthennops . 105, 133 



Protapirus. ....... . 93, 127, 129 



Proterix 85, 126 



Protoceras.... 39, 112, 114, 130 



Protoceras beds 26, 31 



39, 40, 46, 55, 64, 116, 128 



Protohippus 96, 133 



Protomeryx . . 115, 132 



Prototoscorex 85, 125 



Prototheria 75 



Protylopuisi 115 



Prout, H. A 16, 98, 135 



Page 



Pseudolabis 115, 116, 130 



Pumpkin creek 62 



Q 



Quartz crystals 51 



Quinn draw ". 62, 63 



Quinn table 63 



R 



.RJabblts 86, 88 



Railroads 12 



Railroad buttes 119 



Ranches 13 



Rapid City 21, 59 



Rats 86 



Reagan, A. B 142 



Recent deposits 12 



"Red layer" 39, 110 



Red Valley 33 



Restorations 18, 71-72 



Retractile claws 79, 81 



Rhineura 121, 134 



Rhinoceroses 15 



30, 38, 69, 88, 92 



Rhinocerotidae 89, 91 



92, 124, 127, 129, 131, 133 



(Rhinocerotoidea 88-92 



Ries, Heinrich 65, 139 



Riggs 83 



Robinson, Kelly 123 



Rockerville 3 3 



Rocky Mountains 14 



21, 53, 58, 60 



Rodentia 75 



76, 86-88, 127, 129, 130, 133 



Rosebud 62 



Rosebud beds 2 6, 42-43 



Rosehud Indian reserva- 

 tion 22, 42 



Round Top 3 6 



Ruminants Ill 



S 



Saber-tooth tigers 81 



Sage creek 49, 62, 63, 68 



Sage Creek pass 63 



Sage Creek wall 62 



Sand-calcite crystals. . 40, 44-46 

 Sandstone dikes 46-50 



