14 



0-071 mil. in breadth behind, and 0-395 mil. in 

 front, is yellowish, sickle - shaped, muscular, and 

 covered with bristles (Kiichenmeister, Weinland). 

 This is received into a preputial covering, which is 

 0-175 mil. in length (Kiichenmeister); from the pos- 

 terior portion of which runs the vas deferens (PL I. 

 fig. 3, A, ), which is twisted, of an opaque white, 

 and leads to the testicle (PI. I. fig. 3, A, 7) situated 

 in the middle of the articulation, and at right angles 

 to the uterus. Kiichenmeister says he has never been 

 able to trace a testis ; but in this connection he speaks 

 of the cord " which takes a tortuous course, running 

 at a right angle towards the uterus, and running 

 nearly to this, in which it forms convolutions of 0*031 

 mil." Now, as I understand it, this convolution is the 

 testis, which is thus formed in nearly all of the animal., 

 kingdom. It surely cannot be the vas deferens I 



The female genitalia (PI. I. fig. 3) are more diffi- 

 cult and complicated in their structure. Posteriorly 

 to the male genital opening is another one (PI. I. 

 fig. 3, A, 5), with a funnel-shaped aperture of 0-063 

 mil. in breadth (Kiichenmeister). This is the vulva, 

 and communicates with a canal, which first runs par- 

 allel with the vas deferens ; but, quitting this in the 

 middle of its course, winds tortuously into a straight, 

 granular canal (PI. I. fig. 3, A, ), the uterus, into 

 which open dendriform, multilobular branches, from 

 9 to 15 in number (Kiichenmeister), which alternate 

 irregularly, and resemble somewhat a bunch of grapes 

 (ovaries; PL I. fig. 3, A, ??). 



I would suggest, that this median stem, instead of 



