59.9,7,328(8) 
Article VIII REVIEW OF THE SOUTH AMERICAN SCIURID. 
By ads AL Aen: 
Puates J-XIV, anp 25 Text-Ficures. 
CONTENTS. 
Pace, 
Introduction . : P } ‘ : . 148 
Acknowledgments . ; . 150 
Explanation of measurements . : pdt Uitte ; ; ote 
Historical outline ; : nate ; ; wa eeese 
Species and subspecies . : ey) wo 
Comparison of resources and wewpeiats of 1878 oe 1898 ' re ae 
General considerations . ' : : ; ve 8 
Premolar formula . ¢ ‘ : / : ; ; . : po ABS 
Mamme . ; : : ; ' i) eo 
Size as a group eharaniee ; 5 A EOD 
Explanation of text figures 1-12 _. cee aod: 
Ratio of tail length to total sails , : ’ oh EL 
Text figures 1-12. ; ; ; his Reds 
Value of averages and vevion: in datiece ; : ; sit SEG 
Pelage and coloration . ; : ‘ ; oe) Oe 
Skull and teeth. are 
Genera and subgenera of Annetiens. Tree Bauieels ; ANG fee 9) 
North American genera ; . : : } j : ne es |e 
South American genera ; : ' Rig Se 
Explanation of Plates I-VI. site alae 
Plates I-VI. ; ; eee ho 
South American Sciuride . Seber hahs AS ey 
Key to the genera . ; , cerue o 
Genus Microsciurus . o) TSS 
Genus Sciurillus . ; ; a ee 
Genus Leptosciurus ; y : : ; . 199 
Genus Notosciurus : : : ' ; : 1 
Genus Mesosciurus ; . ; oo Be 
Genus Guerlinguetus i ; : 5 ; : ; ; » 254 
Genus Hadrosciurus bea ‘ ‘ : . 266 
Genus Urosciurus . : : : ; : : io ieee 
Genus Simosciurus : : f : : : . » 280 
Explanation of Plates VII-XIV ' ; ( ; ; . 286 
Plates VII-XIV_. ; 289 
Geographic distribution and titcmelaiansbins of Seuth Alnebad awit 297 
Phylogenetic considerations . : , . ; ; , } : . 305 
Addenda ; : ; 4 : : , 241 SOY 
147 
