326 DR. E. KLETX. 



tlie preceding cells. They are met ■\vitli isolated or in groups; 

 in the latter case they are likewise imbricated and forni the 

 wall of gland-tubes, somewhat narrower than those men- 

 tioned sub b. Both are sections of the same gland-tube: the 

 broader^ lined by the transparent flat cells, appear to be the 

 more superficial, the narrower lined by non-granular cells, 

 the deeper portion of the stomach glands. 



d. Exceedingly large transparent placoids, with an oval 

 nucleus in the centre; they are met with relatively rarely, 

 and only in preparations which were made with a view of in- 

 cluding in the scraped flakes the tissue of the deeper parts of 

 the mucosa. When looked at in profile they appear more or 

 less spindle-shaped, the cell-substance a))i)earing at each 

 pole of the nucleus as along filamentous prolongation. The 

 nucleus of these endothelial plates — for such they are in all 

 probability — resembles in aspect and size perfectly that of 

 the flattened transparent gland-cells; the intranuclear net- 

 work presents itself in great clearness. Fragments of the 

 endothelial plates cannot be, therefore, distinguished from 

 those gland-cells. 



As regards the epithelial cells mentioned sub a, it is a 

 fact too conspicuous to be overlooked, even under a moderately 

 high power {e.g. about 300), that the substance of the vppcr 

 transparent, as to ell as the lower or opaqiie part of the goblet- 

 cells co7itai?is. a great number of delicate fibrils, more or 

 less distinctly stained, many parallel to the longitudinal 

 axis of the cell. They are especially distinct in the upper 

 or transparent part of the goblet-cell. These fibrils can, 

 in many cells, be traced up to the free margin of the goblet, 

 i. e. the margin of the cell which, as has been mentioned 

 above, has lost its cover ; they anastomose with each other 

 by lateral branchlets. If such a cell is looked at aloi^ig its 

 longitudinal axis these lateral bianchlets are not very conspi- 

 cuous, but in an oblique, or, still better, in a bird's-eye view, 

 we obtain a clear insight into their arrangement, and we 

 thus convince ourselves ^/m< the longitudinal fibrils and their 

 lateral branchlets form a verg delicate and more or less dense 

 network. This network we shall designate the intracellular 

 nctioorh ; it is rei)iesented in figs. 1, ^, 4, 5. That this net- 

 icork of the intracellular fibrils comes out with such dis- 

 tinctness in these goblet-cells is no doubt due to the infer- 

 fibrillar or ground-substajicc having swollen up very much ; 

 by doing this the meshes of the network become of course 

 distended, and, therefore, distinctly ]ieiceptible. 



The ground-substance or inlerfibrillar substance of these 

 goblet-cells is mucin, and it stains in a characteristic 



