QUO 



Fig. 9. — Hairs of dermestes, p. 87. 1 — analagous to insect hairs ; 

 2 — analagous to bat's hair. 



Fig. 10. — Three varieties of bat's hair, p. 87, 1 — Vampyre ; 

 2 — Indian ; 3 — EugHsh, 



Plate IV. 



Fig. 11. — Hair of deer. To show that the cellular character begins 

 a great distance from bulb, p. 89. 



Fig. 1-2. — Hair of ornithorhyncus. The terminal portion is brovvn, 

 p. 87. 



Fig. 13. — Transverse section of hau' of apterix. This associates 

 directly feathers and hairs. 



Fig. 14. — Hairs of racoon, p. 87. 1 — nearly smooth. ; 2 — scaly ; 

 3 — more scaly ; i — almost equal to Indian bat. 



Fig. 15. — Wool. 1 — black wool in Canada balsam; 2 — common 

 wool, ordinary appearance. 



Fig. 16. — Rat's hair, p. 89. 1 — filled with Canada balsam; 2 — usual 

 appearance. 



Fig. 17. — Hair of shrew mouse, p. 93. To show alternate contrac- 

 tions and dilatations, and that there are no cells to some distance from 

 bulb. 



Plate V. 



Fig. 18. — Plan of hare's fur and hair. One large hair usually 

 emerges with about twenty smaller ones, which form the fur or woolly 

 hairs ; each hair, whether straight or woolly, is furnished with a pair of 

 oil glands, and become cellular at a distance from their roots, p. 98. 



Fig. 19. — Hare's hair and fur. 1, 2, 3 — Large and small hairs; 

 4 — transverse sections, p. 86, 89. 



Fig. 20. — Hair of peccari, p. 91. 1 — longitudinal; 2 — transverse. 



Fig. 21. — Transverse section of feather, p. 91. 



Fig. 22. — Transverse section of hair or quill of porcupine, p. 91. 



Plate VI. 



Fig. 23. — Transverse section of boar's bristle, p. 92. 



Fig. 24. — Transverse section of eyelash of whale, p. 92. 



Fig. 25. — Transverse section of hair of elephant, p. 92, 94. 



Fig. 26. — Insect hairs from the same wing, to show the transition from 

 hairs to scales, p. 85. 



Fig. 27. — Insect hairs, to show the transition from simple type to 

 the type of feathers, p. 84 . 



