Ophidtidæ.
Fierasfer, Cuvier.
Fierasfer homii, Richardson.

Fierasfer homii, Richardson, sp., Voy. Ereb. and Terr. Fishes, p. 74, pl. xxxxiv., figs. 7-18.

Mr. Hedley obtained a large Holothurian (H, argus, Semper,) two feet in length. After it had been in a bucket for half-an-hour, the Fierasfer swam out and was bottled in formol. These parasitic Ophidiidæ, as is well known, inhabit the breathing cavities of various invertebrates; they are said to be quite harmless, though possibly inconvenient to their host.

The specimen does not differ from that described by Richardson, and measures 104 millim. in length.