196 QUARTERLY CHRONICLE OF MICROSCOPICAL SCIENCE, 
viscera, all become more or less blue, just as by injection 
into the blood. In only two places has Von Wittich been 
able to follow exactly the blue-coloured channels, viz. in the 
choroid and in the liver. In both organs the blood-vessels 
were almost completely empty, or only partially filled with 
blood. The blue colour of the choroid arises from a blue 
layer lying around the vessels (Morano’s lymph-sheath of the 
choroidal vessels); in the liver a fine injected network 
surrounds the portal vein and the branches of the hepatic 
vein, from which exceedingly fine, delicate, blue injected pro- 
cesses penetrate into the hepatic lobules between the blood- 
capillaries and the hepatic cells. Strongly injected vessels, 
evident to the naked eye, pass from the hilus, run parallel 
to the large vessels and the bile-ducts, and surround 
these, their finer brauches passing towards the branches 
of the portal vein, but the author observed no direct com- 
munication between these and the perivascular network. 
These vessels are not to be confounded with the blood- 
or bile-capillaries, and Von Wittich can only recognise them 
as lymph-capillaries. Further particulars as to the method 
employed are promised. (London Medical Record.) 
X. Digestive Organs— Minute Anatomy of the Alimen- 
tary Canal.—Mr. Herbert Watney (‘ Proc. Roy. Soc.,’ No. 
152, 1874) has arrived at the following results : 
1. Connective-tissue Corpuscles amongst the Epithelium.— 
In specimens hardened in chromic acid and alcohol and 
stained in hematoxylin, structures are constantly seen among 
the columnar epithelium of the intestinal tract in many 
animals (as monkey, sheep, cat, dog, rat, rabbit) which be- 
long to the connective tissue. These are:—(1) a delicate 
reticulum, which is continuous with that formed by the most 
superficial layer of connective-tissue corpuscles (the basement 
membrane); (2) round nucleated cells, exactly similar to 
those of the mucosa. 
This is the case at the pyloric end of the stomach, or the 
villi, over Peyer’s patches, and in Lieberkiihn’s glands. 
2. The lining endothelium of the lymph-vessels of the 
mucosa is in anatomical continuity with the reticulum of 
nucleated cells (connective-tissue stroma); so that it may be 
said the endothelial cells of the lymphatic vessel are only 
transformed connective-tissue corpuscles. 
3. In animals killed during the absorption of fat (cream) 
the fat can be seen in preparations stained by osmie acid as 
small black particles :—(1st) arranged in lines between or 
around the epithelial cells; (2ndly) in the basement mem- 
brane ; (8rdly) as has been noticed by many previous ob- 
