216 



THE MALPIGHIAN CORPUSCLES. 



90. 



Some anatomists suppose that the Malpighian capsule is not, in reality, 

 a flask-like expansion of the uriniferous tube, 

 but that the tube, dilating, folds over the blood 

 capillaries, and so receives them. However 

 that may be, they form a loose ball in its in- 

 terior, fastened to it only by the arterial twigs 

 and its corresponding and juxtaposed vein. 



The foregoing description is illustrated by 

 the annexed figures, Fig. 89 being half dia- 

 grammatic, from Kolliker. 1, a Malpighian 

 capsule, A, with the tubulus uriniferus, B, C, 

 springing from it ; a, membrane of Malpighian 

 body, continuous at b with the membrana pro- 

 pria of convoluted tubule; c, epithelium of 

 Malpighian corpuscle; d, that of tubule; e, 

 detached epithelium ; f, vas afferens ; g, vas 

 efferens ; A, glomerulus Malpighianus : 2, three 

 naif diagram of human Malpighian epithelial cells from convoluted tubule, magni- 



corpuscle, magnified 300 diameters. fied g 5 Q diameters OD6 with oil drops. 



Fig. 90, Glomerulus, or tuft of blood-vessels from the innermost part 

 of the cortex of the kidney of the horse: #, 

 arteria interlobularis ; a/, vas afferens ; m m, 

 glomerulus ; ef, vas efferens ; b, divisions of 

 arteriola recta in the medullary substance. 



Fig. 91 shows the ciliated epithelium of the 

 uriniferous tube in the frog: a, cavity of the 

 uriniferous tube ; 5, its epithelium ; b', ciliated 

 portion thereof; b", de- 

 tached ciliated epithelial 

 cell ; c, basement mem- 

 brane of the tube ; cf, 

 that of the capsule ; m, 

 capillaries of the tuft ; 

 t, adjacent uriniferous 

 tube. 



Mr. Bowman's expla- 

 nation of the Malpighi- 

 an circulation is repre- 

 sented in Fig. 92. a, 

 branch of renal artery ; 

 of, afferent vessels ; m, 

 m, Malpighian tufts ; ef, 

 eft efferent vessels ; p, 



Fig. 91. 



Glomerulus from the horse, magni- 



Cilia on uriniferous tube of frog. 



