LIST OF PLATES. 



Plate XII. (between p. 130 and p. 131). The Australian Mud- 



nsh (Ceratodus Fosteri) ... ' ... ... Explanation 118 



Plate Xin. (between p. 130 and p. 131). The Mexican Axolotl 

 (Siredon pisciformis) and the European Land-salamander 

 (Salamandra maculata) ... ... ... Explanation 129 



Plate XIV. (between p. 180 and p. 181). Four Catarhines 



(Chimpanzee, Gorilla, Orang, Negro) ... Explanation 181 



Plate XV. (between p. 1S8 and p. 189). Pedigree of Alan 



Explanation 184 



