сое 



Plate II. Stereogram of the structure of the front end of the body of Oligobrachia dogieli, in ventral 

 view. 



ad - anastomosing canal of the coelomoducts; cex - distal canal of coelomoduct; cin - proximal 

 canal of coelomoduct; сое - coelomic canal of tentacle; cue I - protocoele; сое II - mesocoele; 

 cor - heart; ex - excretory portion of coelomoduct; mdv - dorso-ventral muscles; pc - external pore 

 of coelomoduct ; pr - pericardial sac ; / - tentacle ; va - afferent vessel of tentacle ; vd - dorsal vessel ; 

 ve - efferent vessel of tentacle; vl - lateral cephalic vessel; vm - median cephalic vessel; vv - ventral 

 vessel. (After Ivanov, 1960a.) 



