CENTROPYGUS JOSEENSIS 253 



The ovaries (Text-figs. 5, 7, Ov.) are placed in a connective 

 tissue which lies close to the testes. They are much convoluted 

 and extend on either side from somite 12 to somite 16 ; 

 anteriorly they unite at the female atrium. 



This reproductive system shows certain affinities with that of 

 other Herpobdellids, but there is not seen the conducting 

 tissue as described by Brumpt (1899) for H. atomaria. 



Nephridia. 



There are nineteen pairs of nephridia placed in somites 7 to 

 25. As usual the nephridiopores open on the latero-ventral 

 aspect of the annulus preceding that in which the nerve 

 ganghon lies. 



The general structure of the nephridium follows that seen in 

 other members of the Herpobdellidae. 



Ciliated funnels have not previously been found in C e n t r o - 

 pygus joseensis. Kennel was unable to find them; he 

 says that ' in spite of careful examination of serial sections 

 I have never seen a picture which would allow one to conclude 

 the presence of a widely open funnel, and if any opening exists 

 it should be fairly narrow '. These ciliated organs are found 

 in each somite, and in the testicular region one is placed in 

 a dilatation of a branch of the lateral lacuna (lateral blood- 

 vessel of early authors) which lies immediately ventral to each 

 testis (Text-fig. 8, N.f.). 



The structure of the ciliated organ in this leech has some 

 resemblance to that of Nephelis as figured and described 

 by Graf (1899). A comparison of a transverse section of a 

 ciliated funnel of C. joseensis, as shown in Text-fig. 10, 

 with Graf's figures of the ciliated organ of Nephelis quadro- 

 Btriata, shows the similarity of these organs. The terminal 

 vesicle of each nephridium is particularly well developed and 

 lies on either side at the level of the nerve ganglion in relation 

 to it ; portion of the lumen of the vesicle is taken up by the 

 bulging into it of the testis. 



