Xi Illustrations. 
Pachyena gigantea, lower teeth . 
“ ponderosa, upper pbs 
im x K lower: teeth, po-mM:.....:... 
astragalus, puis view... 
poe, ee of structure (9 figs.).. 
é « (10 figs. ca 
Grangerella megastoma n. sp., three views...... 
Eucalodium eophilum n. sp.. 
Helix veterna veternior n. ne seas views. 
Pleurodonte eohippina n. sp., three views............. 
Campeloma calamodontis n. sp., two views. . 
Unio grangert n. sp., dentition of right waives Ae 
“ eomargaron n. sp., outline of shell and dentition of left ale. 
didymictidis n. sp., left valve... $4 
sinope n. sp., dentition of left valve... 
ADNYOChaTAL ONGHMS AP. MOV. .\6..44 6 6 
Doryrhampus sierrd. SP. YIOW. 2... es 
(tai mainacens ap. Wow. el sap Pyke dee. 
South American squirrels, 5 figs., to show relative size...... 
1? 4 “ “ 4 74 “ “ “ “ 
<3 “ “ 
“c 
“ 
“ “ “ 3 “ “c “ o “ 
“ “ “ 4 “ “ “ 
Syntheosciurus brochus, three views of skull, natural size... 
Notosciurus rhoadsi, hind foot. . se rans 
Microsciurus and Sciurillus, map ae Histivsisicn’. Re 
Mesosciurus, map of Bistetnition i 
Hadrosciurus, Urosciurus and Rs bopmotiaet map of Aitsacon, 
Notosciurus, Leptosciurus and Gienniceionas: map of distribution. . 
H Laas speirtanus, upper jaw and lower premolar........ 
£ . lower jaw.. 
Hyopsodus simplex, upper and ews jaw Ppeerbinitis: eet upper pobihes ‘a 
lower molars. . 
lower teeth. . 
mentalis, upper sea ace jaws... 
ienmeliicnies upper Jaw, crown view ee upper errr ee 
i ; lower jaw. 
number and position of mammze 
miticulus, upper one been jaws, ene crown views an upper rae 
Phenacodontide, outlines of upper cheek-teeth of the three genera 
walcottianus, upper and ny er jaws. a 
‘ hind foot, humerus, en sae Fisher a 
“ 
“ 
“ “ lower {3 (<4 “ (<4 en. ean Pee 
sedges es upper teeth, crown views of five species. . 
“ “ (%4 {4 (<9 two “ 
lower “ (<4 “ “ five “ 
{4 (%4 (%4 (¢9 (<4 two “ 
: “external views of five species... . 
(<4 {9 “ {4 “ two (<9 
“ 
intermedius, crowns and external views of unworn barter ary Sak, 
Phenacodus (?) beach ymheneie: upper teeth, crown view. 
-PaGE. 
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