In January of this year similar protonephridia were discovered by me 

 in G. major Brems, (from the intestine of the hedgehog — Erinaceus euro- 

 paeus L.). But before passing to their description, I must remark that 

 I cannot give a sufficiently complete description, as I had at my disposal 

 only two female specimens of the species named, which have been preserved 

 in alcohol during 45 years, and were not, therefore, quite suitable for the 

 study of their histological structure. 



In the structure of the female genital apparatus of the species named, 

 there is much in common with G. hirundinaceus. In both species we see in 

 transverse sections anteriorly to the beginning of the uterine bell, that the- 

 ligament cavity is divided by the median wall into two parts: ventral and 

 dorsal. The latter passes directly into the cavity of the uterine bell, and the 

 ventral is connected with the cavity of the bell by means of the swallowing 

 apparatus through which the immature eggs pass from the bell into it. 

 Probably, here, as in G. hirundinaceus, the ventral cavity of the ligament is 

 connected with the dorsal also by means of an aperture or slit in the ante- 

 rior part of the medial wall of the ligament. Owing to the movements of the 

 swallowing apparatus there is established a current of fluid with the eggs 

 contained in it in the dorsal cavity and the bell in the antero-posterior di- 

 rection, and hence through the swallowing apparatus into the ventral cavity 

 of the ligament, in which the fluid already moves in the opposite direction — 

 toward the opening leading to the dorsal cavity. The protonephridia present 

 convex-oval formations about 0,42 mm. long, and about 0,1 mm. high, ad- 

 jacent with their anterior smaller part to the external dorsolateral surface 

 of the ligament, and with the posterior part — to the bell. When viewed from 

 the surface it is seen that the whole surface of the protonephridium is com- 

 posed of short lobes, which are in their turn divided into terminal branches 

 measuring to 0,033 mm. in length, and 0,006- — 0,012 mmfm thickness. 

 The wall of these branches consists of highly vacuolised protoplasm covered 

 exteriorly with a fine membrana propria and in its central part enclosing a 

 canal, which is quite blind at the distal end. From this blind end a bundle 

 of numerous, thin long cilia filling up nearly the whole canal, are given off. 

 At the base of the cilia are disposed the basal bodies. The above mentioned 

 canals unite by several together into thicker canals, the latter again unite 

 into canals of the first order, which open into the common canal for each 

 protonephridium. Both these canals, in their turn, unite together to form one 

 unpaired canal, running in the wall of the bell in females. The diameter of 

 this canal is not smaller than the diameter of the bell. The point of its ope- 



