PSEUDOGORILLA 225 



PsEUDOGORiLLA MAYEM A ? Alix et Bouvier, 



Gorilla mayenia Alix et Bouv., Bull. Soc. Zool. France, 1877, p. 

 488; I'd. Compt. Rend., LXXXV, p. 56; Rothsch., Proc. Zool. 

 Soc. Lond., p. 415. 



Type locality. Upper Congo. Locality of type unknown. 



Color. Male. Line on back of orbital ridge buffy; line on sides 

 of head in front of ears, cream buff; top of head, nape, hind neck to 

 middle of back, dark reddish, darker than burnt umber ; rest of back, 

 flanks, and hinder parts of thighs iron gray ; lower part of chest and 

 abdomen, black ; sides of head and limbs covered with black hairs 

 tipped with whitish or cream buff; hands and feet black; face and 

 upper part of chest naked, black. 



Female. Line on back of orbital ridge and one in front of ears, 

 buffy ; top of head black tinged with reddish ; back and thighs brown- 

 ish; sides of head, arms, legs below knees black, hairs tipped with 

 cream buff ; lower part of chest and abdomen, black ; hands and feet 

 black; face and upper part of chest naked, black. 



Measurements. Male. Height, 1,350; shoulders to wrist, 300; 

 wrist to tip of middle finger, 230. Skull: total length, 220; occipito- 

 nasal length, 194 ; intertemporal width, 73 ; width of braincase, 107 ; 

 Hensel, 163; zygomatic width, 155; length of nasals, straight, not 

 along the curve, 67.3 ; length of upper canine, 39.6 ; length of mandible, 

 153.5 ; length of lower tooth row, 79.5 ; extreme width of orbits, out- 

 side bony ridge, 124.7. 



There are three specimens of this remarkable species in the 

 Senckenbergian Museum at Frankfort-on-Main, an adult male, an old 

 adult female and a baby, and they differ in size and color from all 

 known species. They are the only examples I have seen and are 

 not represented in any other Museum. The skeleton of the male and 

 skull of the female are also in the collection. The teeth of the male 

 have the cusps perfect, but those of the female are much worn ; the 

 braincase is broad and rather long, and no crest, but low ridges from 

 outer side of orbits extend to the back of the skull ; the lateral occipital 

 expansion is very slight. Orbits large with a considerable depression 

 behind the ridge ; facial region short, and horizontal portion of man- 

 dible rather light ; bony palate long and narrow. 



As the group was in a glass case it was not easy to determine the 

 shades of color, although the front was opened, reflections from the 

 sides interfering somewhat. 



