The body is somewhat barrel-shaped. The anterior or head end is bent ventral. The shell is absent, but the body is covered completely by a transparent integument. The strongly developed wings, the epipodea, are attached to the antero-ventral portion of the body and are fused in the middle. Their posterior margin extends beyond the posterior extremity of the body. It is deeply indented, the entire margin being divided into five distinct lobes, one median and two lateral on each side. The anterior margin of each wing is only slightly curved and is without indentations or lobes. Between the two lobes of the posterior margin of each wing are inserted the epipodial tentacles. These are short, their length being only one and one-half times their width. Each tentacle is supported with a strong nerve and is covered with cilia. Judging by each nerve supply these tentacles are sensory, probably tractile organs. The wings are supplied with well-developed nerves. One strong nerve is sent to each lobe, subdividing and spreading there into several smaller branches, and one large nerve goes to each epipodial tentacle. Long., 1-2 mm., width, 4-5 mm., measured from tip to tip of the spread wings. (Christine Essen-berg.)

USA. Off Southern California.