02 



EXPLANATION OF PAKT OF PLATE VII. 



Fig. 7. A bat's hair, showing the absence of the scales at the root. 



Fig. 8. Portion of another hair, in which the scales are placed nearly at right an- 

 gles with the shaft. 



Fig. 9. Another specimen, in which the scales are placed obliquely. 



Fig. 10. A specimen in which the scales are smaller, and only extend round a por- 

 tion of the circumference. 



Fig. 11. Scales removed from a bat's hair, of a light colour. 



Fig. 12. Scales from a dark hair, exhibiting the pigment. 



Fig. 13. Scales removed from the hair of the Indian bat, which are beautifully ser- 

 rated at their upper margins. 



a. Outside view of the scale. 



b. Inside view. 



Fig. 14. A number of scales closely connected together. 



Fig. 15. Hair of a species of Vampire, in which the scales are very evident at the 

 upper part ; at the lower they have been scraped off, and the cellular in- 

 terior of the hair is exhibited. 



Fig. 16. A small hair of the Indian bat, showing the pointed extremity, and the 

 close manner in which the scales are arranged. 



Fig. 17. A hair of the same bat, exhibiting the whorls of scales more distant from 

 each other, and the smallness of the shaft between them. 



Fig. 18. A similar specimen, from which the scales have been removed in certain parts. 

 a. A scale lying detached from the hair. 



