THE UEINARY ORGANS. 

 Fii;. 218. 



335 



Various preparations to show the structure of the uriniferous tubes, etc. 



I. Three portions of the uriniferous tubes from Rana csculenta, from a natural injection with 

 sulphindigotate of sodium (Hartnack, Oc. I, Syst. 3). — G. H. 

 II. From the third part of a uriniferous tube ; short ciliated epithelium, borax-carmine (Hart- 

 nack, Oc. I, Syst. 7).— G. H. 



III. A Malpighian corpuscle and capsule ; shows the capsule of two layers at a. After Duncan. 



IV. Part of uriniferous tube after natural injection with sulphindigotate of sodium (Hartnack, 



Oc. I, Syst. 3).— G. H. 

 V. Transverse section of one of tlie larger branches of the ureter, from Rana esculenta (Hartnack, 

 Oc. I, Syst. 7).— G. H. 

 VI. Epithelial lining of the ureter itself while still in the kidney (Hartnack, Oc. I, Syst. 7). — G. H. 

 VII. Portion of a uriniferous collecting-tube from section in Fig. 217 I, stained with silver (Hart- 

 nack, Oc. I, Syst. 7).— G. H. 

 VIII. Renal epithelium ; a to 6, tubulus contortus ; & to c, third portion of uriniferous tube ; c to d, 

 fourth portion of tube. After Heidenhain (enlarged 210 times). 

 IX. Ciliated cells of the neck, after Duncan. 



X. Isolated rod-cells of Triton lacniatus, after Heidenhain. 

 XI. Isolated rod-cells, after Heidenhain (enlarged 300 times). 

 XII. Isolated cells of the neck, after Heidenhain (enlarged 210 times). 



Xlir. Portion of the fourth part of a uriniferous tube, after Heidenhain (enlarged 300 times). 

 XIV. Ciliated epithelium of tubulus contortus, after Tornier (magnified 550 times), 

 XV. From kidney of Rana temporaria, after Spengel. 



a Uriniferous tube opening into seminiferoiis duct. 

 I) Dilated seminiferoiis duct cut longitudinally. 

 c \?lr efferens cut transverselv. 



