602 



THE DIGESTIVE TRACT. 



infrequently the central canal contained only a row of these 

 corpuscles, as proved by vertical sections through villi, in speci- 

 mens hardened in a solution of chromic acid. Sometimes in fresh 

 specimens the green bodies were seen, as if incarcerated at the 

 apex in an intra-epithelial canal. By gentle pressure on the 

 covering-glass some of the bodies could be forced out from 

 the apex (see Fig. 258). From these phenomena in the small 



FIG. 258. VILLUS FROM THE SMALL INTESTINE OF A GUINEA-PIG. 

 FRESH SPECIMEN. [PUBLISHED IN 1868.] 



C, granular (chlorophyll?) corpuscle, forced out from the interior of the villus; O, such 

 corpuscles filling the cleft between the columnar epithelia ; JB, capillary blood- vessel. Mag 

 nified 800 diameters. 



intestine of guinea-pigs, from anatomical facts, and a number of 

 successful experiments in bringing extraneous matters (carmine 

 and aniline granules) into the lymph-vessel of the villus from 

 without, it would follow that the apex of the villus has in its 

 epithelial investment one or two perforations in direct connec- 

 tion with the central lymph- vessel, which serves to take up solid 

 material, mainly fat-granules. J. Nath. Lieberkiihn, in 1745, 



