THE ANATOMY AXD DEVELOPMENT OF PERCPATUS NOV A E- BRIT AVXI AE- 13 



mines XVI 10 XT ixjdtaave. The gene- 

 "•is -o-^iies :: Tie ps-illie . Tie 



says Sedgwick (Monograph p. 96) " does 

 -rior. rezi^is ir. :-.:iir:_:i — :i lie 

 irrirlvr r«ir: :: tie ::rz^i:a:cs 

 :iere:':re — ■rcir.ec -epiriiii. :~: > 

 een them and the gcnoatnc tubes is 

 :•: zczzzil 'tzzzi-ih. T~~e liner is 

 i :: :"r.e s:r-n:e i^i ::es seen 



ibm) axe 



In the last-named species therefore the generative organs arise in one segment 

 only. Thus from the beginning to die end the frrnilr generative organs af P. a ttwud m 

 and P. cnpmn'i appear to differ radically from one another 



In P. xc^^ :ir z-varlal :-avi rv sc-s ;z:e is reoepiooilun :T;rzn ir-i re- 



>rp1iiO"I-"ani SO -jJL-1 Z.S -Z ~.11S TeST-eOT. ' l~r- 



In P. aoiae-ormmmae the anatoniieal relations of the mfundibula and ovary 

 ^.To'."z:arilj silts': i_ rii.:: h:i^.".;rr — 1 :i -.'z- rjni'. *r_i er. i-si: .:' i -tziriii^ii. 

 I Live no :bserr-A~:r_s •iesekpnie::: ;: :"-ese :rg-izis. 



Uteri. The only parte of the fema l e generative system whose topography is fairly 

 content, are its two Umiinal portions, ovary and vagina; what hes between has no 

 regularity whatever in its disposition and it is impossible, from my matoiial, to say 

 whether any partirnlar arrangement is the normal one. In the individual figured 

 in Fig. l£ the outer or vaginal ends of the uteri each contain a pigmented 

 embryo nearly ready for birth. The portion of die uterus which hes ptmtoiiialf 

 over the apcerir* zr:zz tie zr—^ belong ~~- ri?-i siic •:: -v — .^1 



It is really the left uterus and its narrow end passes to the left side and bends 

 under the left nerve-cord to open into the vagina. In another specimen the uteri 

 on being exposed, presented a nearly identical appearance to the one just referred to, 

 but the uterus lying over the rectum in this case turned out to be actually the right 

 uterus and its narrow luminal portion bent down and passed under the right nerve- 

 cord to open into the vagina. 



Each uterus on leaving the region of the ovary ptoses .vri-- :.r ?, ~:-c~.--z 

 i Imb iim r and then bends sharply round upon itself to lead back to the vagina. These 

 two portions of the f|-shaped uterus may be icfcncd to as the ascending and 

 descending pwt»«np* respectively. The distal portion of the uterine tubes, that is. 

 the portion which abuts on the receptacuhv is much coded and the stiff 



fflwlw will not easily unravel in preserved sped mens. In Fig. 13. the arcemliiig right 

 uterus, after emerging from the coil, is seen to pass over and then under the 

 ascending left uterus. Up to this point both uteri are diie c te d to wa r d s the ventral 

 side of the body-cavity ; but now the ascending right uterus dees to the dorsal side 



z~'.zz ~.'zi zi~ii:-,z_ 

 zz^i :ie ~ ■-" - 



tenor.- The gen 

 zizz zzi 



