Bryophila Carpenter, 1864, non Treitschke, 1825. Type species (M): Bryophila setosa Carpenter, 1864. Recent, northeastern Pacific. Philobrya Cooper, 1867, ex Carpenter MS. Type species (M): Bryophila setosa Carpenter. Philobrya Carpenter, 1872, nom. nov pro Bryophila Carpenter, non Treitschke. Shell small, thin, inequilateral, mytiliform, equivalve. Periostracum dehiscent, generally hirsute. Umbones projecting, with depressed prodissoconch. Hinge edentate, with vertical crenulations. Ligament internal, or partly external. Anterior adductor scar obsolete. Byssate. This genus is best developed in the Antarctic regions and is represented in the northeastern Pacific by one species. Carpenter (1872) proposed Philobrya as a replacement name for the preoccupied Bryophila, but this name had already been made available by Cooper (1867). Because Cooper's proposal was not expressly noted as a replacement name, it must be treated as a new genus (ICZN Code Art. 67h). The name is derived from reversal of the original Greek bryos, sea-moss, and phileo, to love, referring to the nestling habit; the gender is feminine. Recorded as early as the early Cretaceous. Literature: Clasing (1918), B. Morton (1978b).