x : Illustrations. 
milleri; Figs. 19-20, Guerlinguetus estuans estuans, Figs. 21-22, G. estuans gil- 
vigularis; Figs. 23-24, G. ingram. 
XIV.— Maxillary teeth of South American Squirrels. Figs. 1-2, Urosciurus duida; 
Figs. 3-4, U. igniventris igniventris; Figs. 5-6, Simosciurus stramineus stramineus; 
Figs. 7-8, Hadrosciurus flammifer. 
XV.— Arctostylops steint, lower jaw. 
Text FIGURES. 
PaGeE. 
Chriacus galline, upper and lower teeth, crown and outer views of mi_2, p?-m? 6 
4 “ parts of limb bones and fore foot.. 6 
Thryptacodon olsent, upper teeth, crown and baie; views. ya 7 
p antiquus, upper teeth, lower jaw, and distal ead of eta 9 
. olsent, skull and crown view of upper teeth.. . 10 
¥, “ parts of fore limb.. 11 
. ‘““ bones of hind ob. feet? 12 
Anacodon ursidens, lower jaw and crown view niet tseis.. 15 
5 cultridens, upper and lower cheek teeth, crown views ... Reale 16 
Didymictis, upper teeth of D. altidens, D. protenus, D. haydenianus....... .. j 19 
. protenus lysitensis, upper teeth, crown view; left side, m\; lower 
jaw, outer view; calcaneum and astragalus.. 22 
i altidens, palatal and side views of skull. . 23 
" “lower jaw, outer view, with crown view of thei, 24 
ae “ tibia and fibula, anterior and distal views....... . 25 
‘s “hind foot, dorsal and inner views. Te eyes 26 
Vwerravus, lower jaws of V. dawkinsianus, V. acutus, v aliens ; 27 
ft. acutus, lower jaw, inner and outer views, and crown view of death 27 
r “ upper jaw fragment with molar teeth. . 28 
$ politus, lower teeth, inner and outer views. , 28 
Uintacyon massetericus, lower jaw, outer view, and crown wand aloes views pes 
Fs . teeth. . Gan 26. 
. upper jaw fragments as 1 pa a left bis eta ta 
¥ . right side .. pees Pen kit 30 
rudis, lower jaw fragment anal crown views -) atti ne a 30 
Miia taiens aint 1h, CHOIR: TOWES RMB Cre. Se Leas os ek eee 33 
“ _ exiguus, palate view of skull............ CDA de ree ES, er 34 
“lower jaw, inner, coclieel and aber views. ye aig a Rc, 35: 
“ latidens, upper and lovee Jaw with molar teeth, 6g. ek. Te en 36 
Vulpavus CANO IS ane Vs melratis; AO WERE. Lo. clon eee. 8 a ee ee 37 
Sriciol “lower jaw and crown view of bata” Mek cere Pian: 38 
: australis, lower jaw and outer view and crown view of suite 5 39 
V dissienen. pronichodon, CONDON AN. SCAR i Cech Said ges slit) VkaN lS eee 2 40 
a r Le tenn FE Hs ss Kec Wet hE RO 4] 
a 4 lower jaw-and teeth. Ret Pye fc oe an eae 42 
: is humerus, radius, ulna, ‘sna nae eres. aie, 43 
<calleaneurh-and astiagalos.. eer Rear oo We. Oe eae an 44. 
