JOURNAL OF MICROSCOPICAL SCIENCE. 



EXPLANATION OF PLATE XXIII, 



Illustrating Mr. Walter Gardiner's Paper on the " Develop* 

 ment of the Water-glands in the Leaf of the Saxifraga 

 crusiata,'^ 



(All the figures refer to Saxifraga crustaia.) 

 FlG. 1. — Transparent preparation of a mature leaf. 

 ff. Water-gland. 



Fig. 2, — Longitudinal section of a bud. 



m. Mother-cell of water-pore. b. Young hairs, p. runes' 

 turn vegetationis. /. Rudimentary leaf. 



Fig. 3. — Surface view of young leaf. 



6. Hairs, ta. Water-pore. y. Secondary lobe. v. Main 

 fibro-vascular bundle. 



Fig. 4. — Surface view of young lobe. 



t?i. Mother-cell of water-pore. w. Mother<.cell which has 

 undergone division. 



Fig. 5. — Longitudinal section of fully developed, though not fully grow 

 gland. 



b. Hairs, w. Water-pore. e. Endodermis. 



Fig. 6. — Transverse section of gland. 

 e. Endodermis. 



Fig. 7. — Cells of mature gland (longitudinal). 



Fig. 8. — Mature water-pores. 



Fig. 9. — Mature stoma. 



n. Displaced cell. 



Fig. 10. — Surface view of a portion of the epidermis, showing develop* 

 ment of stomata. 



i, ii, iii, and iv. A'arious stages of development, n. Dis- 

 placed cell. m. Mother-cell of stoma, iv. Stoma. 



