资料来源 : pyDict

直神经亚纲

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Euthyneura \Eu`thy*neu"ra\, n. pl. [NL., fr. Gr. ? straight + ?
   a nerve.] (Zo["o]l.)
   A large division of gastropod molluske, including the
   Pulmonifera and Opisthobranchiata.