Opisthomi (opisthomi)

pl. [NL., suspended from the vertebral column, the dorsal fin repOpisthomide (op-is-thom'i-de), n. pl. [NL., by spines, and the ventrals abdominal or none. Opisthomum + -ida.] A family of rhabdocelous turbellarians, typified by the genus Opistho mum, having the mouth at the opisthen or terior end of the body, leading into a tubular protrusible pharynx. See cut at Rhabdocæla. opisthomous (op-is-thō'mus), a. Pertaining to the Opisthomi, or having their characters. Opisthomum (ō-pis'thō-mum), n. [NL., irreg. for * Opisthostomum, cla ification of fishes, a subfamily of Siluride, containing South American catfishes. Opisthopterus (op-is-thop'te-rus), n. [NL.,