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POPULAR SCIENCE REVIEW. 
EXPLANATION OF PLATE XCV. 
Fig. 1. The Gorilla {Troglodytes gorilla). 
„ 2. Skull of the Gorilla vertically and antero-posteriorly bisected, to 
show the great sagittal crest (s) rising above the brain cavity, 
and the supra- orbital crest (o) above the orbit. 
„ 3. The Squirrel Monkey {ehrysothrix sciurea). 
„ 4. The Potto {Perodicticus Potto), showing the rudimentary condi- 
tion of the index finger. 
,, 5. The Angwantibo {Arctocehus calabar ensis). 
„ 6. The Tarsier {Tarsius spectrum)^ showing the foot at its maximum 
of elongation, relatively, in the whole order Primates. 
„ 7. The Aye- Aye {Cheiromys madagascariensis). 
