ATELES. 733 
tail beneath distally, naked; fur not woolly; middle incisors long, 
broad; molars small, rounded. 
hey DO THE See CIES, 
A. Limbs and tail long, body slender. 
a. Upper parts black. PAGE 
a. Under parts prayish white... .... 6b. ned A. vellerosus 733 
hie FURiRlOr Denne Hust LOO os ees cacy hala vara WA A. geoffroyt 73 
© Under parts deep fulvous. 0. oy es ol A. rufiventris 734 
gra.  UMGCer Panis WHEE... 8k yor ves cok caw dhl wd A Ger. 734 
b. Upper parts grizzled black and silvery gray, 
MORSE OED ER VIS sf Bo kly oespe bx wa! oat a Paced A. grisescens 734 
684. vellerosus (Ateles), Gray, Proc. Zoél. Soc., 1865, p. 733. 
juliginosus Schleg., Mus. Pays-Bas., 111, 1876, p. 179. (nec 
Kuhl.) 
pan Schleg., Mus. Pays-Bas., 111, 1876, p. 180. 
MEXICAN SPIDER MONKEY. 
Type locality. Unknown. 
Geogr. Distr. Volcano of Orizaba, State of Vera Cruz, south to 
Guatemala, Central America. 
Genl. Char. Those of the genus. Fur long, spreading. 
Color. Head, limbs, hands, and feet exteriorly, and tail, black; 
loins and sides golden brown; under parts grayish or yellowish white. 
Measurements. Total length, 1310; tail vertebra, 832; hind foot, 
183. Skull: occipito-nasal length, 93; zygomatic width, 65; Hensel, 
59; palatal length, 27; width of pterygoid fossa at hamular processes, 
26; length of upper molar series, 23; length of mandible, 50; height 
at condyle, 38; length of lower molar series, 26. 
685. geoffroyi (Ateles), Kuhl, Beit. Zodl., 1820, p. 26. 
melanochir Desm., Mamm., 1820, p. 76. 
frontatus Gray, Ann. Mag. Nat. Hist., rst Ser., x, 1842, p. 256. 
hybridus Gray, Cat. Monkeys, etc., Brit. Mus., 1870, p. 43. 
ornatus Gray, Cat. Monkeys, etc., Brit. Mus., 1870, p. 44. 
albifrons Gray, Cat. Monkeys, etc., Brit. Mus., 1870, p. 44. 
variegaius Frantzius, in Weigm., Arch. f. Naturg., xxxv, 1, p. 
257. (nec Wagn.) 
GEOFFROY’S SPIDER MonKEyY. Mono Colorado in Costa Rica. 
Type locality. Unknown. Type specimen in Museum of Paris. 
Geogr. Distr. Nicaragua in Central America to Colombia, South 
America. 
Color.. Very variable. Light grayish drab; hands, feet, elbows, 
and knees black; face black, mouth flesh color; patch of erect black 
