GEOLOGICAL DEVELOPMENT OF THE HORSE TRIBE (from Huxley's _American Addresses_) 34.

DIAGRAM ILLUSTRATING THE GEOLOGICAL DISTRIBUTION OF PLANTS (from Ward's _Sketch of Palaeobotany_) 35.

TRANSFORMATION OF ARTEMIA SALINA TO A.MILHAUSENII (from Semper's _Animal Life_) 36.

BRANCHIPUS STAGNALIS AND ARTEMIA SALINA (from Semper's _Animal Life_) 37.

CHIMPANZEE (TROGLODYTES NIGER).