(lOi:) 



is £0iu-: on, iudivi duals whicl: wero bom later in U.e aumner of 



tne vpar- bn-f"o re, L-e,,in to aevelop testes ana lo f hopho rul organs 



aji'i t^^us we have iiiaiviuuals with lopt'Opno ral orj^ans and testes 



the 

 occnrrinii; at the same tirac o f^ year as imividuals without loph- 



ophoral organs sua with ovaries. 



V/hile 1 have liO absolute proof, 1 thinx tnat the upper part, 

 at least, of tne lophopnoral or^raixS, +'unctions as a kind of 

 seirdnal rec^'ptacle. 1 am lea to this conclusion by these 

 ■f'actst first, tnat tiie oru,ans appear only when tv.e testes are 

 present; second., tliat 1 have seen lar^re bunci.es of sp ermatczoa 

 in the body cavity, in the nephriaia ana in the cavity of the 

 lophophorsl or,,an3; ana third, that ti.ere are ciliatea ^.rocves 

 leaaint;:: froin the nephriaial pores to the cavities o^ tj.e loph- 

 p i ic r al r £:. ans . 



— Vascular Sxstem:^__ Nearly all o^ the early investigators 

 of the anatoirry of Phoronis recognize the existence of an effer- 

 ent and afferent vessel ;vnien are in connection witn vessels run- 

 ninij up into the tentacles. 



Calawoll's (3) aescription, altnourh brie-, is coinplete arzd 

 differs verj little -ro:a later ones. 



Cori's (4) account seems to be whrnt n« <, ^ . 



^^ ae cib>^ut the saiue as Calci.vel 1 '3 ; 



however, he recognises one rin^ vesse; 



t3cribes in raore detail the relati 

 a els aiid the ring: vessel. 



^e^ instead of two and de- 

 ion between tl:e tentacular ves- 



