PLATE IV. 

 Detail of wall of aciuus, matni-e glands of parotid. Detail of epidermis. 

 Detail of gland of outer battery (Camera lucida). 



a. e. c. — epithelial cell with cytoplasm alveolar in appearance. 



b. e. — beaker cell, superimposed against an ordinary epithelial cell. 

 c. — capillary and corpuscles. 



c. t. — connective tissue fibers, 

 e. n. — epithelial nuclei, naked. 



g. e. c. — epithelial cell with granular cyptoplasm. 



g. s. — germinating stratum. 



1. b. — intercellular bridges. 



m. — matrix. 



m. f. — smooth muscle fiber, and nucleus. 



m. s. — molt stratum. 



p. — processes. 



s. — secretion. 



t. s. — transitional stratum. 



Fig. 43. Second year toad. Vertical section of gland. X 413\'3. 



Fig. 44. Vertical section of adjacent glands, with intervening connective 

 tissue. X 413V3. 



Fig. 45. Vertical section of gland, x -413' Z,. 



Fig. 4G. Second year toad. Vertical section of adjacent glands, with in- 

 tervening connective tissue, x 413\/3. 



Fig. 47. Vertical section of gland, near lower pole. X 413V3. 



Fig. 48. Vertical section of epidermis. X 5.j3Vo. 



Fig. 49. Second year toad. Vertical section of epidermis. Parotid. X 



553V3. 



Fig. 50. Vertical section near centre of gland of outer battery, parotid. 

 X 413V3. 



