480 
DE. HERBEET WATNEY ON THE MINUTE 
of a rabbit. The psorospermise and lymph-corpuscles are seen to have invaded 
the epithelium. 
Ps. Psorospermiae. 
Ep. Epithelium. 
Ic. Lymph-corpuscles. 
Fig. 2. Camera Lucida : obj. 7, X450. The drawing was completed by means of 
oc. in., obj. 9. 
Vertical section of part of a lymphatic follicle from the vermiform process 
of a rabbit. 
Ic. Lymph-corpuscles. 
Fig. 3. Oc. hi., obj. 9, x550. 
Epithelial cell with tw r o attached lymph-corpuscles, from the small intestine 
of a rabbit. Teased preparation which had lain twenty-four hours in one 
per cent, bichromate of potash, and was then treated with dilute acetic acid. 
Fig. 4. Camera Lucida: obj. 8, X 600 — oc. m., obj. 11 immersion. 
Transverse section of epithelial cells of the surface of a villus, from the 
small intestine of a rabbit. The tissue had been stained in gold chloride and 
hardened in chromic acid. 
The reticulum (r) is seen to surround the epithelial cells. 
Fig. 5. Camera Lucida: obj. 8, x600 — oc. hi., obj. 9. 
Oblique section of a Lieberkuhn’s crypt, from the small intestine of a 
sheep. 
r. Reticulum. 
Ep. Epithelium. 
e. Endothelial cells. 
Ic. Lymph-corpuscles. 
The reticulum (r) is seen to send processes around the epithelial cell (Ep), 
and between the endothelial cells ( e ) of the membrana propria. 
Fig. 6. Camera Lucida: obj. 8, x 600 — oc. ill., obj. 9. 
The membrana propria of the villus with the attached blood-vessels, from 
a section of the small intestine of a monkey. The membrane is seen to be 
composed of cells ; it has holes or gaps in it. 
Fig. 7. Camera Lucida: obj. 5, X300 — oc. hi., obj. 7. 
Membrana propria of the ducts of the stomach-tubes, from a section of a 
dog’s stomach. The appearances presented by the membrana propria of 
Lieberkuhn’s crypts are exactly similar. 
Fig. 8. Camera Lucida : obj. 5, X 300 — oc. ill., obj. 8. 
Two alveoli of the mammary gland, from a section of a mammary gland 
of a cat. The cells have been almost entirely shaken out of the membrana. 
Gc. Remaining gland-cells. 
