228 Dr Martin Barry on the 



hood of the crystalline lens in the chick in ovo and a fcetal sheep ; very nuicli 

 enlarged, especially the hyaline, which has increased in quantity at the ex- 

 pense of the red colouring matter. Magnified 600 diameters. (Phil. Trans. , 

 1841.) See the description of Fig. 47. 



Fig. 47. A small portion of one of the dilated capillaries at the edge of the 

 crystalline lens in a foetal ox of 18 inches ; filled with blood-corpuscles in greatly 

 enlarged and altered states. This cajiillary was most unequal in calibre at 

 different parts. Magnified 600 diameters. (Phil. Trans., 1841, Plate XX1\\, 

 Fig. 152.) The blood-corpuscles, or rather cells, were for the most part rup- 

 tured. At the upper part of the figure on the riglit hand, they were still en- 

 tire. The part reddened is the red colouring matter, and the white exhibits 

 the hyaline from the ruptured cells. In the capillaries the red colouring mat- 

 ter of the corpuscles serves as a sort of pabulum for the hyaline centres of those 

 corpuscles; the quantity of which hyaline in some corpuscles becomes, as in 

 the present instance, where new parts were forming, prodigiously large; the 

 red colouring matter in proportion disappearing. This capillary contained no 

 liquor sanguinis. The hyaline, from the nuclei of the blood-cells, is the sub- 

 stance which seems to pass through the walls of the capillaries; and in some 

 parts (a) there are seen what appear to be nucleal orifices for this purpose. 

 (See also S of Fig. 49.) 



Globules of the hyaline, after escaping from the capillaries, seem to become 

 cytoblasts, in which red colouring matter is again formed ; not excepting even 

 those entering into the formation of the pellucid crystalline. Several of the 

 bodies last referred to are seen in outline at /3. (This oi"iginally colourless 

 substance, derived from the nuclei of blood-cells, appears to constitute the es- 

 sential part of coagulable lymph, to organise the same, to serve for nutrition, 

 and to give origin to the tissues, &c. It seems to be this same originally 

 colourless substance, derived from the nuclei of blood-cells, that forms the ex- 

 udation-corpuscles of authors, the filaments of false membrane, and the fila- 

 ments in coagulating blood ; filaments which, as I have shewn, here and there 

 arise while this substance is still within the cells.) 



Fig. 48. or., Outline of capillaries as seen at the inner surface of the wall of 

 the infundibulum of the Fallopian tube, in a rabbit killed 5^ hours post co't'ium. 

 At the lower part are epithelium cells carrying cilia. These epithelium cells 

 are arranged parallel to one another, and perpendicular to the general direc- 

 tion of the capillaries. The small extremity of the epithelium cells is directed 

 towards the capillaries : whence their frill-like appearance (in the figure), and 

 the great extent of their ciliary surface. External diameter of the largest ves- 

 sel al^'"' 100 Diam. /3, A portion of the capillary plexus «t, magnified £00 

 diameters. These capillaries are in the state of vital turgescence ; filled with 

 blood-corpuscles (which have become true cells), to the exclusion of surrounding 

 fluid. Such is the state of all the capillaries in that region at such time. Many 

 of the corpuscles so minute that their hyaline presented the appearance of a 

 dark point, y, Network formed by the coalescence of cells derived from cor- 

 puscles of the blood ; which, like those entering into the formation of the cho- 

 rion, have for this purpose sent out processes or arms. The finest ramifications 

 in arborescent states of the capillaries, like that at «, have fcometimes appeared 

 to pass into a network of this kirid. 



