xii ILLUSTRATIONS 



Latin Inscription on " Maen Madoc" .... Facing page 251 



Porth-yr-Ogof, Vale of Neath " 252 



Alfred R. Wallace. 1848 " 266 



(From a daguerrotype) 



Fishes of the Rio Negro : 



(From drawings by A. R. Wallace) 



i. Cynodon Scombroides. Fam. Characinid^e " 284 



(One-fourth natural size) 



2. xlphostoma lateristriga. fam. chara- 



cinid^e " 284 



(One-third natural size) 



3. Pimelodus Holomelas. Fam. Silurid^e . . " 286 



(One-third natural size) 



4. Plecostomus Guacari. Fam. Loricariid.k . " 286 



(One-third natural size) 



5. Pterophyllum Scalara. Fam. CichlidjE . " 288 



(One-third natural size) 



6. Cichlosoma Severum. Fam. Cichlid,e . . " 288 



(One-third natural size) 



H. E. Wallace. Age 8 " 290 



(From a pencil sketch by Miss Townsend) 



Herbert Edward Wallace. Age 20 .... . " 290 



(From a silhouette) 



The Rio Negro " 320 



{From observations made in the years 1851 and 1852 by 

 Alfred R. Wallace) 



Enlarged Map of the River Uaupes " 320 



Native House, Wokan, Aru Islands " 357 



(Where I lived two weeks in March, 1859) 



Map of the Malay Archipelago " 368 



My Faithful Malay Boy — All 1855-1862 ... " 382 



Alfred R. Wallace. 1869 386 



(From a photograph by Mr. Sims) 



