OCR Text |
Show 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 mucosa?; 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 260 diameters, o, o, orifices of the glands; c, columnar epithelium 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 {Dorcopsis luctuosa). Magnified about 60 diameters. F, follicle; el, depression or pit in the mucosa over the follicle; gl, glands of the mucosa with lymphoid tissue between them and at their base; m.m, muscularis mucosas ; s.m, submucous areolar tissue with lymphoid tissue near muscularis mucosae ; 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 (Macropus giganteus), showing six of the tubular glands. Magnified about 135 diameters, c, columnar epithelium of the surface ; o, o, orifices of the glands ; I, I, lymphatic vessels in the interglandular tissue of the mucous membrane; m', m', bundles of plain muscular tissue passing up between the bases of the glands from the muscularis mucosa?, which is not represented in this figure. Fig. 6. Vertical section of the third or peptic region of stomach (Dorcopsis luctuosa). 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 mucosae. 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, capillary blood-vessels cut across in the interglandular 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 diameters. Fig. 10. Section across the line of demarkation between the second and third regions of the gastric mucous membrane (Dorcopsis luctuosa). Magnified 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 which contain the peptic cells; m.m, muscularis 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 10 the outlines of the glands are only roughly indicated. PROC. ZOOL. Soc-1876, No. XII. 12 |