

D. THE STOMACH, BY E. KLEIN. 559 



In the lower portions of the submucous tissue I find isolated, 

 distinctly defined, usually oval lymph follicles, flattened from 

 within outwards, in the capsule of which are contained nume- 

 rous fusiform cells, with oblong, flattened nuclei. Some of the 

 follicles are bounded by the muscularis mucosse internally, and 

 muscularis externa on their outer side, whilst others, as may 

 occasionally be observed in the intestines of Mammals, pene- 

 trate the muscularis mucosse, and extend to the cylindrical 

 epithelium of the surface. 



The submucous tissue itself, like that of the oesophagus, is 

 moderately compact, and about O2 of a millimeter thick. The ex- 

 ternal muscular layer presents, though not uniformly an internal 

 circular, and an external, much thinner, longitudinal layer. 



In some places, instead of the latter, a few oblique fasciculi 

 are found, which lower down enter the circular layer. Towards 

 the pylorus both the circular, as well as the longitudinal layers 

 which have here become independent, increase in thickness. The 

 nerves and ganglia present the same relations as in- the intesti- 

 nal canal of the Vertebrata.] 



