NEW MAI.I.01'HA(}A. 179 



and second testes (beginning with tlie one in front) 

 is longer than that between the second and third. The 

 anterior en<l of each testis reaches some distance 

 anterior to the posterior end of the one in front. Eacli 

 vas deferens proceeds a short distance back of the last 

 testis and tlien turns toward the median line of the 

 body, the two are here connected by a transverse duct 

 (c d) and enter the large mass of muscles surrounding 

 the invaginated penis (this structure together with the 

 muscles will be described under the head of the External 

 Genitalia; see puMea). They pass between the libers 

 and enter the cavity surrounded by them; turning then 

 forward they run in this direction along the upper part 

 of the cavity to the anterior end of the latter. Here 

 they emerge from the muscles and go forward to the 

 vesicula seminalis (.^v), each entering the side of this 

 organ toward the set of testes with which it is in con- 

 nection. 



The seminal vesicle is very large, composed of two 

 only slightly united lobes. It is elongated antero-pos- 

 teriorly, tapering at both ends, and connected with the 

 ductus ejaculatorius at its posterior ends. The latter is, 

 as stated, a very long tube, and is consequently very 

 much coiled. It begins at the posterior completely 

 united end of the vesicula seminalis as a rather wide 

 tube. Jt runs backwards from here only a short dis- 

 tance and then makes a turn toward the median line, 

 the seminal vesicle being situated a little to the left. 

 Here it makes a small loop upon itself antl then runs 

 forward to near the anterior end uf the seminal vesi- 

 cle, which readies forward into the metat borax, mak- 

 ing during this course a second loop upon itself. At 

 the anterior end of the vesicula it makes a sharp bend 

 backward, dorsal to the vesicula. and runs in a straight 



