JOURNAL OF MICROSCOPICAL SCIENCE. 



EXPLANATION OF PLATE XVI, 



Illustrating Dr. Klein's paper, " Observations on the 

 Structure of Cells and Nuclei." 



Figures 1 — 12 (incl.) refer to preparations of stomach, 13 — 23 to 

 those of mesentery of newt. For method of preparing see text. All 

 fiojures are represented as seen on Hartnack's small stand with eye-piece 

 III, and Zeiss's objective F, except 17 e, which is drawn with Hartnack's 

 No. 10 Immersion. 



Figs. I and 2 represent goblet-cells ; the intranuclear network is well 

 shown, and also the fibrils passing from this into the upper and lower 

 part of the cell. 



Fig. 3, a, h, and c. — The intranuclear network separated from the 

 membrane of the nucleus. 



Fig. 4. — A goblet-cell (like that of 1 and 2) as seen obliquely from 

 above, showing the intracellular network. 



Fig. 5. — The intracellular network looked at vertically from above. 



Fig. 6. — Two isolated nuclei showing the intranuclear network ; this 

 has shrunk to a considerable extent. 



Fig. 7. — A gland-cell, showing the dense network of fine fibrils 

 of the cell-substance ; the nucleus has escaped, but there are still left a 

 few fibrils, probably connecting the two networks, viz. the intranuclear 

 and the intracellular. 



Fig. 8. — An isolated nucleus of a gland-cell ; the wall of the nucleus 

 is broken at one place and the intranuclear fibrils are seen passing 

 outwards. 



Fig. 9. — A connective-tissue corpuscle — endothelial plate — seen in 

 profile ; both the intracellular fibrils and those of the intranuclear 

 network are well shown. 



Fig. 10. — A similar cell seen from its broad surface. 



Fig. 11. — Portion of a cell ; the intranuclear network shrunk. 



Fig. 12. — Two epithelial cells ; the intracellular fibrils are well shown. 

 The top of both cells is seen in an oblique direction, and the network of 

 fibrils is therefore brought into view. Preparation treated with 

 Miiller's fluid and then with mixture of chromic acid and spirit; see 

 text. 



Figs. 13, 14, 15. — Isolated endothelial plates of surface of mesentery. 

 The intracellular and intranuclear networks of fibrils are well shown. 



Fig. 1(3. — A capillary blood-vessel ; the two upper nuclei are seen from 

 their broad side, the two lower in profile. They all show the networL of 

 fibrils. In the lower portion of the wall of the vessel an imperfect 

 network of fibrils may be perceived. 



