MINUTE ANATOMY OF THE ALIMENTARY CANAL. 219 



phatics which Loven injected by the method of puncture. 

 The muscle bands run up by the side of the perivascular 

 spaces and end in a very similar manner to that which has 

 been already described in the account of Chapter I. 



A fine reticulum is described as existing among the epi- 

 thelium of the coiled tubes. It is shown that if in a vertical 

 section one of the coiled tubes is found running vertically 

 and is viewed from the outside, so that the epithelium is seen 

 in an optical horizontal section, the reticulum appears as 

 small branched bodies united by processes (see fig. 7). If 

 the section cut one of the tubes obliquely, we get appear- 

 ances similar to fig. 8. In both figures the nuclei of the 

 epithelial cells can be seen between the threads of the reti- 

 culum. Fig. 9 gives the appearances presented by a section 

 made from the same tissue hardened in Miiller's fluid and 

 osmic acid. It will be noticed how much broader the reti- 

 culum appears than in fig. 8, and it explains the view 

 Schwalbe took, that this appearance is due to a network of 

 canals. 



It was found that whatever be the state of digestion, the 

 nuclei almost always exist as flattened discs lying at the 

 lower part of the cells. At times, indeed, the nuclei were 

 found to have a spherical form, but never over a considerable 

 tract of the stomach. During digestion the cells are granular 

 and stain more readily than during inanition. The writer, 

 therefore, diflfers in opinion very materially from Ebstein ; 

 first, in regard to the contraction of the mucous membrane 

 of the stomach; secondly, in the shape of the nuclei of the 

 cells of the coiled tubes in various states of digestion ; and 

 thirdly, in describing an interepithelial reticulum. 



A third foi'm of nucleus is described and figured which 

 Avas sometimes met with, the nucleus appearing to be under- 

 going some form of vacuolation. 



It was observed that, in young animals, the surface epithe- 

 lium is apparently completely filled with fat, as had been 

 previously noticed by Bruch and Kolliker ; whereas in fully 

 developed animals, while no fat is found in the epithelium 

 of the surface, the epithelium of the ducts and coiled tubes 

 appears cloudy with fat, especially in animals whose stomachs 

 contain bile. No explanation is offered of these appearances, 

 the author reserving that to another paper. 



Chapter III describes the continuity of Brunner's glands 

 with the coiled tubes of the stomach. 



First, a short history is given which shows how nearly 

 Cobelli arrived at the same results. He, however, thought 



