Illustrations xi 



C. — Lasiopyga pygerythra griseisticta: adult male; three views of head. 



CI. — Erythrocebus patas pyrronotus: adult male; two views of head. 



CII-CIII. — Colobus langi, new species: type skull; lateral, dorsal, palatal, front, and 



occipital views; crown and lateral views of mandible. 

 CIV. — Colobus powelli powelli: adult female; three views of head. 

 CV. — Colobus powelli powelli, adult female; and Colobus powelli brunneus, adult male, 



showing anal region. 

 CVI. — Colobus powelli brunneus: three views of heads of adult male and female. 

 CVII-CVIII. — Colobus abyssinicus ituricus: adult male; young male; two views of 



head of adult male. 

 CIX. Colobus angolensis cottoni and Colobus abyssinicus ituricus: three-quarter 



view of heads. 

 CX-CXI. — Colobus angolensis cottoni: adult female; two views of head; general 



body proportions of adult female; young female. 

 CXII-CXXI. — Colobus powelli powelli: adult male and female skulls; comparative 



left lateral, dorsal, palatal, front, and occipital views; comparative left lateral 



and crown views of mandible. 

 CXXII-CXXXI. — Colobus powelli brunneus: adult male and female skulls; compara- 

 tive left lateral, dorsal, palatal, front, and occipital views; comparative left 



lateral and crown views of mandible. 

 CXXXII-CXLI. — Colobus abyssinicus ituricus: adult male and female skulls; com- 

 parative left lateral, dorsal, palatal, front, and occipital views; comparative 



left lateral and crown views of mandible. 

 CXLII-CLI. — Colobus angolensis cottoni: adult male and female skulls; comparative 



left lateral, dorsal, palatal, front, and occipital views; comparative left lateral 



and crown views of mandible. 

 CLII-CLXV. — Pan schweinfurthii: general body proportions of adult female and 



young male; front, side, and three-quarter views of heads of adult, subadult, 



and young males and females. 

 CLXVL- — Hands and feet of Colobus angolensis cottoni and Pan schweinfurthii. 

 CLXVII. — Nest of Pan schweinfurthii. 



Text Figures 



Page 



Development of dentition in Rhynchocyon stuhlmanni claudi 34 



Lutramaculicollis: skull of adult male; lateral and palatal views; lateral view of 



left mandible; crown view of left lower dentition 86 



Lutra maculicollis: dorsal view of skull of adult male 87 



Lutra maculicollis: skull of juvenile male; lateral, palatal, and dorsal views; 



lateral view of left mandible; crown view of left lower dentition 89 



Rhinarium of Lutra maculicollis and Aonyx capensis 91 



Palmar surface of left fore foot and plantar surface of left hind foot of Lutra 



maculicollis, Aonyx capensis, and Micraonyx cinerea 93 



Micraonyx cinerea: skull of adult female; lateral and palatal views; lateral 



view of left mandible; crown view of left lower dentition 96 



Micraonyx cinerea: dorsal view of skull of adult female 97 



Aonyx capensis: skull of adult female; lateral and palatal views 102 



