What is (a) A central cavity in the Ctenophora, into which the gastric sac leads. (b) The siphon of Cephalopoda. See Cephalopoda called?

infundibulum — (Zoöl.) (a) A central cavity in the Ctenophora, into which the gastric sac leads. (b) The siphon of Cephalopoda. See Cephalopoda. (Webster's 1913.)

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