Abstract
Adults of the caryophyllaeid cestodes Biacetabulum infrequens Hunter and B. macrocephalum McCrae occur in catostomTd fishes and procer-coids develop in annelids of the genus Tubifex, but not in those of Limnodrilus. Procercoids are characterized by a cercomer, primordia of gonads, and a well-developed scolex. B. macrocephalum procercoids are infective to fish at 62 days. The genus Archigetes is distinguished from Biacetabulum on the basis of differences in morphology, definitive hosts, intermediate hosts, and larval development.

This publication has 0 references indexed in Scilit: