CTENOPHORES OF J 



THE* ATLANTIC COAST OF NORTH AMERICA II 



Fig. 4.—Pleurobrachia pileus, from life by the author. 

 Halifax, Nova Scotia, September 27, 19 10. 



\ side view: B, looking down on oral pole, ad, adradial canals; ex, excretory pores; 



* ' f funnel or inf undibulum ; //, axial funnel tube; g, paragastnc canals; i mter- 

 rkdial canals; w, mouth; p, pole-plate; pr, perradial canals; sto, stomodaeum, 

 ^tentacular canals ; ten, tentacles ; ts, tentacle-sheaths. One tentacle is shown 

 in partial contraction, the other extended. 



