424 



ZOOLOCJY 



SECT. 



cavity of the ninth segment, but extend into the tenth, where 

 they coalesce in the middle to form a large median sac of some- 

 what irregular form, the anterior sperm reservoir (ant. sp. res.). 

 The anterior pair of testes project into this, and the cells destined 

 to form the sperms, developed in the former, pass by dehiscence 

 into the large median cavity. On either side is a large ciliated 

 tcl, or rosette (fun.), leading outwards from the interior of the 

 reservoir. A second pair of vesicular seminales (mid. ves. sem.), 

 situated in the eleventh segment, also open into the anterior 



cint. fes. sent 

 'ftl \ int n.co 



ctnt. sp.res 



rec 



post vss. ?/ 



-4. Immbricus aerricola. reproductive organs. interior sperm reservoir ; 



interior left vesicula senrinalis ;/<//>. funnel-like opcM> ; cfT<jrentia : 



o'/. intermuscular partitions ; . miiidlc vesiciil.-i - >. CD. nerve cord ; or. 



- ''. nviiliR't HI reservoir: ,,<. posterior 



ihi seniiniilis ; rec. recejitacula seniinis; if, anterior; / L ', posterior tcste.s ; v. </</. vusa 

 deferentia. (After Vogt and .luny.) 



sperm reservoir. A third pair (post. -vcs. sem.), situated in the 

 twelfth segment, unite in front to form the posterior sp- rvoir 



(vast. sp. res.), which lies' in the middle of the cavity of the 

 eleventh si-trmi'iit. The posterior pairs of testes have t the same 

 relation to this as the anterior pair have to the anterior reservoir ; 

 and a posterior pair of ciliated funnels (fun.) leads outwards from 

 uvity. Each ciliated funnel leads to a narrow, somewhat in- 

 voluted duct, tli ' rens, and the two vasa efferentia of each 

 side unite t<> form a vas <l<j\'i'cnx or spcrn i<lnct (<'. def.). right or 

 left a* the ease may be. which passes almost straight backwards 



