JOURNAL OF MICROSCOPICAL SCIENCE. 
EXPLANATION OF PLATE XXVI, 
Illustrating Professor Ray Lankester’s Memoir on Intra- 
epithelial Capillaries in the Integument of the Medi- 
cinal Leech.^^ 
Fig. 1. — Mallet -shaped cells of the tegumentary epithelium : — b. shows 
a portion of the cuticle adherent to the conjoined “ heads ” of two of the 
cells. Macerated preparation. 
Fig. 2.— From a transverse section of a Leech, hardened in ^ per cent, 
chromic acid, followed by alcohol : — cu. cuticle ; v. intra-epithelial blood- 
vessel; ep. epithelial cells (mallet-shaped). ' 
Fig. 3. — From a similar section: — cuticle; t?. intra-epithelial vessel 
in transverse section; pg. intra-epithelial pigment process (modified 
vaso-fibrous tissue) ; ep. mallet-shaped epithelial ^cells ; gl. superficial uni- 
cellular gland. 
Fig. 4. — From a similar section : — c. s. compact connective substance 
(sub-epithelial layer of the integument). Other letters as in fig. 3. 
Fig. 5. — Cuticle detached by maceration, showing openings of unicellular 
glands. 
Fig. 6. — Surface view of a flake of tegumentary epithelium, prepared by 
maceration in potassium bichromate and staining with picro-carmine. The 
dark-coloured “ handles ” of the cells appearing like nuclei (and possibly 
representing such) are seen disposed in groups. 
Figs. 7, 8, and 9. — Similarly prepared epithelial cells, showing the finely 
granular character of the cell-substance ; and in figs. 8 and 9, the perfora- 
tion of the cell by the apertures of unicellular glands. 
