SYNTHETOSCIURUS. on 
b.”” Superior outline of skull not greatly PAGE 
PRM py ete oe Gry te ule valoda "ere oe Guerlinguetus 103 
b.’ Premolars, =. 
a.’ Braincase highly arched on posterior 
MemeeGr FeOtiGats.. «i eo Pe odio cA eee Microsciurus 98 
b.”” Braincase rounded and slightly arched 
on posterior half of frontals............ Batosciurus 100 
c. Size large; total length over 450 mm. 
a.’ Premolars, —. 
a.” Front of skull depressed at base of ros- 
ROR TEN MT ee an, on ete soa See ee eae ate Ar@osciurus 106 
bh.” Front of skull arched at base of ros- 
AT PETT AI oe RR CA ea en a Sn a Parasciurus 110 
1.’ Premolars, =. 
a.” Tail short, broad, bushy. 
a.’’’ Braincase depressed, inflated laterally. Otosciturus 111 
b.” Tail long, narrow, bushy. 
a.’ Nasals equal to least interorbital 
RRCIEE Oe res oatahg o at wa ws Echinoscturus 113 
b.’’’ Nasals longer than least interorbital 
PIEDRA 2 5 woe Bodie MO We acess aces Hesperosciurus 130 
The first genus of the Sciuride is remarkable for the slender 
lower incisors which project outwards, and the upper ones are 
grooved in the center. But one species is known. 
33. *Synthetosciurus. 
Syntheosciurus (sic) Bangs, Bull. Mus. Comp. Zodl., 1902, 
Meh Ee exie, D. 25. 
Premolars, —. Size small. Skull thin, papery; rostrum straight, 
audital bulla small; incisors slender, the lower pair projecting out- 
ward, the upper with central groove. 
67. brochus (Syntheosciurus!), Bangs, Bull. Mus. Comp. Zo6l., xxxIx, 
1902, p. 25. ; 
PROJECTING-TEETH SQUIRREL. 
Type locality. Boquete, Chiriqui, Panama. Altitude 7,000 feet. 
Genl. Char. Size small; ears low, round, woolly; pelage long, soft, 
woolly; other characters as in genus. 
*aNV0ETUG-Ex fuvpetT= Synthetosciurus. 
