2. " " " Henle . . . . . . . . . . . . . . . . 24
3. " " " " . . . . . . . . . . . . . . . . 25
4 Small dog watching a cat on a table 43
5 Dog approaching another dog with hostile intentions 52
6. Dog in a humble and affectionate frame of mind 53
7. Half-bred Shepherd Dog 54
8. Dog caressing his master 55
9. Cat, savage, and prepared to fight 58
10. Cat in an affectionate frame of mind 59
11. Sound-producing quills from the tail of the Porcupine 93
12. Hen driving away a dog from her chickens......98
13. Swan driving away an intruder.................99
14. Head of snarling dog.........................117
15. Cat terrified at a dog.......................125
16. Cynopithecus niger, in a placid condition....135
17. The same, when pleased by being caressed.....135
18. Chimpanzee disappointed and sulky............139
19. Photograph of an insane woman................296
20. Terror.......................................299
21. Horror and Agony.............................306

Plate I. to face page 147 Plate V. to face page 254.
" II. " 178. " VI. " 264.
" III. " 200. " VII. " 300.
" IV. " 248.

_N. B_.--Several of the figures in these seven Heliotype Plates have been
reproduced from photographs, instead of from the original negatives;
and they are in consequence somewhat indistinct. Nevertheless they are
faithful copies, and are much superior for my purpose to any drawing,