PAP 10 145 



grading into brown. Ex specimen in British Museum, procured by 

 Riippell in Abyssinia in 1836. 



The usual coloring of this baboon is much lighter than the example 

 described above, and is an ashy gray on mane, and upper parts washed 

 with greenish, the hairs ringed with black and greenish gray; fore arms 

 and legs grayish black; under side of body grayish white. 



Riippell's specimen is an adult male, and darker in color than is 

 generally seen among individuals of this species. 



Measurements. Skull : total length, 192 ; occipito-nasal length, 

 156; Hensel, 133; zygomatic width, 113; intertemporal width, 52; 

 palatal length, 84 ; breadth of braincase, 82 ; median length of nasals, 

 68 ; length of upper molar series, 50 ; length of upper canines, 32 ; length 

 of mandible, 139; length of lower molar series, 65. 



Both sexes of this species have large air sacs or pouches in the 

 neck, which reach down nearly to the arm pits. An opening above the 

 larynx connects these with the windpipe. 



Blanford in his Observations on the Geology and Zoology of 

 Abyssinia (1. c.) gives the following account of this baboon: "The 

 great Dog-faced Baboon, the Sacred Ape (Thoth) of the ancient 

 Egyptians, is by far the commonest Monkey throughout the portion of 

 Abyssinia traversed by me. It was met with everywhere from the 

 plains around Annesley Bay to the top of the Delanta plateau, although 

 most abundant, perhaps, in the tropical and subtropical portions of the 

 country. I saw a small herd close to Theodore's old camp at Baba, on 

 the Delanta plateau at above 9,000 feet of elevation. In the passes 

 leading to the tableland from the coast immense numbers were con- 

 stantly seen, and the animals evidently keep to the sides of rocky 

 ravines. 



"The herds vary in number; some cannot include much less than 

 250 to 300 monkeys of all ages. The old males are always most con- 

 spicuous animals, all the forepart of the body being covered with long 

 hair. They usually take the lead when the troop is moving; some of 

 them also bringing up the rear ; others placing themselves on high 

 rocks or bushes, and keeping a sharp look-out after enemies. A troop 

 collected on a rocky crag presents a most singular appearance. I 

 several times saw large numbers assembled around springs in the 

 evening in the thirsty Shoho country between Komayli and Sanafe. 

 On such occasions every jutting rock, every little stone more prominent 

 than the rest, was occupied by a patriarch of the herd who sat, with 

 the gravity and watchfulness befitting his grizzled hair, waiting 



