EXPLANATION 



OF 



THE OUTLINE PLATES. 



PLATE I. BLOOD, 



(To face p. 4.) 

 FIG. 



1. Coloured blood-corpuscle of a newt or frog on the flat. 



2. Coloured blood-corpuscle of a newt or frog on the edge. 



3. Effect of acetic acid on a newt's corpuscle. 



4. Effect of syrup on a newt's corpuscle. 



5. Effect of tannic acid on a newt's corpuscle. 



6. Effect of water on a newt's corpuscle. 



7. Effect of osmic acid and picrocarmine on a newt's corpuscle. 



8. Colourless blood- corpuscles of a newt or frog. 



9. Human blood-corpuscles (coloured and colourless) and fibrin. 



10. Human coloured blood-corpuscle on edge. 



1 1. Human coloured blood-corpuscle on the flat ; centre in focus and out of focus. 



12. Human coloured blood-corpuscle crenated. 



13. Human colourless blood-corpuscles. 



14. Effect of acetic acid on these corpuscles. 



1 5. Effect of a magenta solution on these corpuscles. 



PLATE II. EPITHELIUM. 



(To face p. 12.) 



1. Squamous epithelium and salivary corpuscles (mouth). 



2. Squamous epithelium cuticle of newt (intra-cellular plexus of fibrils). 



3. Silvered epithelium (mesentery of a rabbit). 



4. Columnar epithelium of the intestine. 



5. Vertical section of the cornea. 



6. Chalice or goblet cell from the small intestine. 



7. Columnar epithelium from a newt's intestine. 



8. Ciliated epithelium of the trachea, 



9. The free ends of the cells of fig. 8. 



10. Bars of the gills of a mussel. 



11. Transitional epithelium. 



12. Secretory epithelium. 



