426 E AVACE CARLIER 



4 IX. Beyond the nucleus the protoplasm exhibits an indistinct longitudinal 

 striation, stains greyish, and is vacuolated to somc extent. It measures 

 about 12,5 1^ in length. 



The nucleus is large and situated very neaiiy in the middle of the cell, 

 reaching rather nearer to the attached than to the free end ofthe cell; late- 

 rally it almost touches the cell wall. It is an oblong structure with rounded 

 extremities and nearly straight sides. On an average it measures 17 p. in 

 length and 14 i-"- in breadth. It is surrounded by a thin nuclear membrane 

 that stains ofa pale blue colour, and to the inner surface of which small 

 karyosomes often adhère. The chromatin is fairly abundant and stains of a 

 deep blue tint; it is arranged in the form of elongated, streak-like and irregu- 

 larly rounded karyosomes usually united together by minute threads ofthe 

 same material. The nucleoplasm when precipitated in the form of lanthanin 

 granules is abundant and stains pale sky-blue. 



The nucleoli which stain of a venous red colour are usually of small 

 size and arranged near the pôles of the nucleus and in their immédiate 

 neighbourhood no lanthanin is formed so that they appear to lie in little 

 colourless vacuoles. They are never surrounded by an envelope of chroma- 

 tin. Some minute particles of a similar staining material are usually présent 

 in the nucleus, but are scattered indiscriminately through it. 



The cells are arranged side by side in a single row and touch one an- 

 other only by the straight sides of their mucigen cups; hère they are united 

 together by a little cément substance, that sometimes extends in the form 

 of streaks upwards upon the convex lids for a short distance This cément 

 when viewed from above forms a net like arrangement described by M. 

 Heidenhain'" and his pupil Th. Cohn". Below the level of this cément the 

 cells are separated by lymph spaces that are traversed below the level ofthe 

 nucleus by cell bridges. The lymph spaces communicate with those of the 

 connective tissue of the mucous membrane, upon which the epithelial cells 

 are directly planted. 



In ail the hundreds of préparations examined not one single cell of this 

 description exhibited any signs of karyokinetic division, though cells in pro- 

 cess of dissolution are by no means rare. 



Further the surface cells vary somewhat in size and shape in différent 

 parts ofthe stomach, but ail présent the gênerai appearance described above. 



