Pouchetia, [110]

Pourtalesia, [554];

P. jeffreysi, [554]

Pourtalesiidae, [554] n.

Prae-oral process, of ciliated band, of Bipinnaria and Ophiopluteus, [606];

of Echinopluteus, [607]

—see also Pre-oral

Pratt, E. M., [339], [348] n., [399] n.

Praya, [300], [306].

Prayinae, [306]