292 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



show a most marked avidity for eosiii. The gland cells 

 stand out very distinctly in methyl-blue-eosin stained 

 preparations, for their contents appear lig-ht blue, whilst 

 the epithelium generally is a dense red, a granular red ! 



They do not occur in very great numbers. In some 

 sections the lumen of the oesophagus is filled here with 

 the blue stained contents of tliese gland cells and the 

 red stained extruded cells. Eosinophilous granules also 

 abound in the secretion. 



Tlie Caecum. — The caecum differs from the part just 

 described in having the simple folds of epithelium and 

 connective tissue thrown into most complex secondary 

 folds. Thus the lumen is split up and reduced in size, 

 and the connective tissue is reduced to a thin layer 

 between the folds of epithelium. 



Another important and obvious distinction is that 

 the eosinophilous cells have become much reduced in 

 number, and hence the lining epithelium has almost lost 

 the granular densely stained appearance. A few 

 scattered gland cells are to be found. What the function 

 of this caecum may be it is difficult to say, for the walls 

 are not in the least like the walls of a gland, and gland 

 cells are reduced in number. 



The Stornacli. — In structure; the wall of tlio st()m;)cli 

 does not differ essentially from tlie rest of the alimentary 

 canal. Tlie cavity is lined by a layer of columnar 

 ciliated e])itlielial cells (liexagonal in transverse section), 

 which are perhaps not so long noi' so slender as the cells 

 of the rectum, but resemble them closely. Amongst 

 these cells iiic scuttcicd cosiiiopliilous cells of the same 

 charactei' as iliose found else\\liere in the walls of the gut. 

 (jland cells occur but rarely. The nuclei of the epiihelinl 

 cells are io be iound neaicr 1o Ihe basal iiieiiibraiie ihan 

 thosf! of Ihe cells (»r ihe reinainiiig pails oi ili(! digestive 



