TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATE VI, 
Illustrating Dr. Harley^s paper on Cutaneous Respiration. 
1. — The deep and superficial layers of the epidermis of the Frog's skin. 
a. Epithelium covering the openings. 
b. Central cell, with aperture. 
2. — Deep layer of epidermis, showing the arrangement of the openings. 
3. — Central cells, containing the triangular apertures in different stages of 
enlargement. 
4. — Oval opening in the central cell of the Water-Lizard. 
5. — Cutis vera of the Frog. 
a. Lining membrane of the air-passage. 
b. Peculiar bodies^ resembling in some respects Pacinian corpuscles. 
c. Pigment -cells. 
d. Termination of the spread-out ends of the perpendicular fibres, 
6. — Transverse section of the Frog's skin. 
a. Epidermis. 
b. Peculiar bodies distributed among the pigment-cells. 
c. Cutis vera. 
d. The air-cavities, cut through in different parts. 
e. Blood-vessels. 
f. Nerves. 
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