BIIIANG TILL K. SV. VET.-AKAD. UANDL. BAND 27. AFD. IT. N:0 6. 37 



Haidenhain and drown with the camera lucida. Highly mag- 

 uificd.^ 

 Fig. 10, Longitudinal section of the wall of an imraature fcmale tu- 

 be, /, folds filled with blood-fluid and leucocytcs. Highly 

 magnified. 



3- H. Transversc section of a nearly mature female tube. e, egg; 

 ef, egg with raicropyle; /, folds reduced; /m, follide-mem- 

 brane. Highly magnified. 



» 12. Part of a section through an immature egg. /, follicle- 

 membrane; ?/, yolk; vg, vesicula germinativa; s, the niicro- 

 pyle in an earlier developmental state with the "blackish 

 body". Highly magnified. 



Plate II. 



» 13. Part of a transverse section through the left side of the effereut 

 duct showing the columnar ciliated cells on its inner surface. 

 The cells are here very crowded; their narrow basal-por- 

 tions, being mostly cut off in the section, appear as irre- 

 gular Crossing dark bands enlarged towards the nuclei and 

 separated by finely granulated masses of light colour; these 

 masses, a, are the cut ends of bundles of very fine fila- 

 ments ruuning in a longitudinal direction. Highly mag- 

 nified. 



» 14. Transverse section of a canal in the germinal cord with 

 primary germinal cells, a, a migratory cell with spheres; 

 Z, lumen of the canal. Highly magnified. 



» 15. Section through the micropyle of a nearly ripe egg. a, a 

 cylindrical slightly curved body protruding from the egg 

 within the cavity of the genital tube; h, foUicle-membrane; 

 c, outer layer of the egg; d, the inner main-portioii of the 

 egg with wider meshes; i\ valve-like formation running out 

 from the dark line of demarcation. Highly magnified. 



» K). Similar view of another egg with a globular body protru- 

 ding within the cavity; letters the same as in fig. 15. 



» 17. Section through a small protuberance in a state of resorp- 



'^ tion, the remaining part of the genital tul)e having been 



destroyed. All the tissues are in a state of absorption by 



means of migratory plasma-cells with larger and smaller 



spheres. 



» 18. Transverse section of a female genital tube with most of the 

 eggs destroyed and absorbed by migratory cells with vacuo- 



' The following figures in the plates I and II are all drawn with the aid 

 of an Abbé's camera lucida and a Winkel, mostly ^34 oil immersion, oc. 3. 

 Thcy aro all treated with iron-haematoxyline in conformity to the method of 

 Haidenhain. 



