186 B. SHIMEK AFTONIAN FOSSILI FERGUS GRAVEL AND SAND BEDS 



185. Camehis (?), second phalanx. 

 67. Eqidis , OS calcaneum, 3 specimens. 



69. Equus , proximal end of radius. 



72. Equus , ulna, part. 



75. Equus , scapula, part. 



77. Equus , 3 incisors. 



78. Equus , dorsal vertebra. 



79. Equus , astragalus. 



80. Equus , 4 cannon bones. 



81. Equus , humerus, 2 specimens. 



82. Equus , entire tibia and fragments. 



85. Equus , distal end of femur. 



86. Equus , first phalanx, 3 bones. 



87. Equus , part of large vertebra. 



88. Equus , distal end of radius, 2 pieces. 



137. Equus , distal end of left tibia. 



224. Equus , metacarpal. 



70, 120, 123, 126-127, 129-135. Equus , molars. 



116-119, 125, 185. Equus scotti, molars (see ibid., plate 18, figures 1-6). 

 121, 124, 128. Equus complicatus, molars (see ibid., plate 19, figures 



1-5, and plate 21, figures 2-4). 

 162. Mylodon — — , claw (see ibid., plate 26). 

 Numerous fragments of bones and teeth. 



There were also obtained the following mollusks : 



XJnio , smooth heavy shell. 



XJnio metanever, 1 valve. 

 Unio , smooth shell. 



18. Pechenpaugh sections. — These are located on the east side of the 

 Boyer Kiver near the mill-dam, at Logan, Iowa. There are really three 

 sections, but they lie in close proximity and present the same essential 

 facts. 



The largest section was made in quarrying rock just above the dam.^^ 



The quarry section shows the following formations : 



Loess and soil, 20 feet. 



Loveland, reddish, somewhat sandy, 6 feet. 



Af tonian : 



Sand, cross-bedded, 7 feet. 



Coarse ferruginous gravel, 2 feet. 

 Missourian limestone, exposed 4 feet. 



The water in the Boyer Eiver above the dam is about 5 feet lower than 

 the bottom of this section. 



^^ See photograph of this section, ibid., plate 35, figure 2. 



