Bull. U. S. F. C. 1899. (To face page 304.1 



PLATE 34. 



12 



,c; 

 ' ' 



,$>- 



<y// 





. ; /;' s*&2g&%$ffi#'r. '' - f > : 



'%x>-- : '-',** '":''' *' -.'>'..''! ' 

 *' 'i^-.v ,**:::: v-i-t: w* ;;*' > 



*Wk't%^;W.2&-^ 



-irtA'V-. '. :-"^ .v. ', . j?n._n_^ ; ' ' ' ; 



o 



l-:/>/!nli II, i htmi/HinU KJI. inn-, ji-iini tin 1 >.!/> I'iiif ii f llitxt/iit/x i-i iiti-nrn. 



11. Ventral view of specimen mounted in balsam. I. 



I 1 -'. \Yiitral view of anterior half of same >hc>\\ ini; the .m-anuviiieni 

 i if the genital ortfans, partly diagrammatic. :IN. 

 r', Aperture of cirrus; mi, ]Mirtinn of uterus where the eggs are 

 molded and the shell laid on: 0d, germ duct al I he point where 

 it is joined by the short yolk dud i see i/'l. Mir. I 1 1 : ;/<i'. nenn duet 

 at the point where it is joined liy the seminal duet; si; seminal 

 receptacle; to', opening of uterus; , opening of vagina; yr, viiel- 

 line reservoir. 



The line from n indicates a part of the ovary in which the irenn 

 cells were free to move and were always thrown into a stale of 

 oscillation by the rush of yolk from the reservoir (yr) which 

 preceded the formation of each es<g. 



The line ,-.( louche^ the seminal vi-M-iele at a point \\here.i 

 regular jinlsation was observed, which still continued in a speci- 

 men which had been lyin.ir in sea water for twelve hours, most 

 of the time under a eover .yla -. 

 i:j. A jiair of hooks from the posterior sucker. iiv 

 14. Transverse section through the ovary and yolk i-oervnir. iuu. 

 <(/. (ienn duct at the point where it i- joined by the short duet 

 from the yolk reservoir I///M; ,/i/. i:vrni duet: </. beginning of the 

 yen 1 1 duet in the ovary in which oscillating germs were observed 

 in the living specimen. 

 1.">. cierni cell. SINI. 



