1876.] MUCOUS MEMBRANE IN KANGAROOS. 177 



about 260 diameters, n, neck, m, middle part, b, fundus, o, orifices of 

 the glands ; c, columnar epithelium of the surface continued into the 

 mouths of the glands; m.m, muscularis mucosae; v, v, blood-vessels 

 cut across. 



Fig. 3. Vertical section of part of a lymphoid patch, from the stomach of 

 Macropus giganteus, showing three of the tubular glands. Magnified 

 about 200 diameters, o, o, orifices of the glands ; c, columnar epithe- 

 lium of the surface ; n, neck, m, middle part, b, base or fundus of the 

 glands; m.m, muscularis mucosae ; s.m, submucosa ; l.t, lymphoid tissue, 



Fig. 4. Section of a nodule or follicle from lymphoid patch of stomach (Dor- 

 copsis luctuosa). Magnified about 60 diameters. F, follicle; d, de- 

 pression or pit in the mucosa over the follicle; gl, glands of the 

 mucosa with lymphoid tissue between tbem and at their base ; m.m, 

 muscularis mucosas ; s.m, submucous areolar tissue with lymphoid tissue 

 near muscularis mucosa; ; l.s, lymphatic sinus at base of follicle. 



Plate X. 



Fig. 5. Vertical section of mucous membrane of second region of stomach near 

 the pylorus (Maeropus giganteus), showing six of the tubular glands. 

 Magnified about 135 diameters, c. columnar epithelium of the sur- 

 face ; o, o, orifices of the glands : A /, lymphatic vessels in the inter- 

 glandular tissue of the mucous membrane ; m', m', bundles of plain 

 muscular tissue passing up between the bases of the glands from the 

 muscularis mucosae, which is not represented in this figure. 



Fig. 6. Vertical section of the third or peptic region of stomach (Dorcopsis luc- 

 tuosa). Magnified about 60 diameters. p. part of the glands which 

 contain peptic or delomorphous cells ; b, bases of the glands destitute 

 of these; m.m, muscularis mucosa;. 



Plate XI. 



Fig. 7. Middle part of three tubular glands from vertical section of peptic 

 region of the stomach (Dorcopsis luctuosa). Magnified about 260 

 diameters, p, p, peptic cells ; c. c, central or adelomorphous cells. 



Fig. 8. Horizontal section of peptic region at level of middle of the glands 

 (Dorcopsis luctuosa). Magnified about 260 diameters, p, p, peptic 

 cells, c, c, central cells, b.m, basement membrane of glands; v, v, capil- 

 lary blood-vessels cut across in the interglaudular tissue. 



Fig. 9. Base or fundus of one of the peptic glands, seen to be occupied entirely 

 by the angular central cells (Dorcopsis). Magnified about 260 diame- 

 ters. 



Fig. 10. Section across the line of demarkation between the second and third 

 regions of the gastric mucous membrane (Dorcopsis luctuosa). Mag- 

 nified about 60 diameters. B, mucous membrane of the second region ; 

 C, mucous membrane of third or peptic region ; X X , depression at 

 the junction between the second and third regions ; p, parts of the 

 glands of the third region winch contain the peptic cells ; m.m, mus- 

 cularis mucosae. 

 Figs. 1, 2, 3, 4, and 5 are from preparations which had been coloured with 



logwood-alum ; figs. 6, 7, 8, 9, and 10 from sections stained with aniline blue. 



In figs. 6 and ] the outlines of the glands are only roughly indicated. 



Pkoc . Zool. Soc— 1876, No. XII. 12 



