; Illustrations. 
Ectocion, upper teeth, crown ‘views of three species... 
“ lower “ “ “ four “ 
e Meas “external views, of four species.... 
Ectocion ralstonensis, lower jaw, external view. .. 
Meniscotherium terrerubre, carpus and metacarpus. . 
« 
f tapiacitis, lower jaw, crown view. 
chamense, upper and lower teeth, crown views........... 
Meniscotherium (?) priscum, fourth milk molar and fiat ae ieolar: 
Schizaspis lobata, caudal structure and mouth parts... 
Aspidiotus coryphe, caudal structures of adult female....... 
Lepidosaphes iwxore, caudal structures and scales. . 
Arctostylops steini, outer view of lower teeth... 
. “ inner view of lower teeth.... 
crown view of lower teeth... 
Pelycodus ralstoni, upper jaw, external and crown views.. 
“ “ 
(9 “ 
trigonodus, upper jaw and outer and crown views of teeth 
“ 44 
jarrovit, upper jaw, outer and crown views............ 
. “ lower jaw, inner and crown views. ........ 
5 : caleaneum, astragalus and entocuneiform. . 
upper teeth, crown view.. -, 
tutus, lower jaw, inner, outer and crown views. 
Notharctus venticolus, maxilla, outer view and crown view of bomtk ; 
“ {5 
“ <3 
“ 
‘ : upper and lower molars... 
< nunienus, lower jaw, outer view enue crown view ae dest 
Omomys sp., lower jaw, inner, outer and crown views......... 
’ “ upper jaw, outer and crown views. 
& vespertinus, lower jaw, outer view cae crown view mab en 
if 43 upper jaw, outer and crown views of teeth. . 
Hemiacodon gracilis, lower jaw, inner, outer and crown views. . 
inner, outer and crown views of lower jaw............... 
oe ee ec ee 8 
lower jaw and inner and crown views of teeth... 
frugivorus, lower jaw fragments, outer and crown views... . 
ee oe eo ew woe 8 
lower jaw, outer view and crown view of teeth... . 
oe ee eo we ee 
Washakius insignis, lower jaw fragment, inner, outer and crown views. . 
Shoshonius cooperi, lower jaw, and crown view of teeth. . 
Uintanius turriculorum, lower jaw, inner, outer and crown views. 
3 ‘3 upper jaw, outer and crown views... 
Anaptomorphus emulus, lower jaw, inner, outer and crown views. . 
Tetonius homunculus, skull and lower jaw, side view....... 
4 sf lower jaw, inner and crown views.. 
. ambiguus, lower jaw, inner, outer and crown views. 
“musculus, lower jaw, outer view, and crown view of ee ober 
eto e i lower jaw fragment, with crown views of teeth.......... 
Absarokius abbotti, lower jaw, inner and outer views. 
. noctivagus, lower jaw, inner and outer views, ane crown view moe 
teeth. . Pate a ey 
é if upper jaw, cies ad crown views. 
Microsyops elegans, upper jaw, outer and crown views......... 
* “ lower jaw, outer and crown views... 
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