Branchiae pectinated; adhering by a large portion of their external margin; opening outwards by a single aperture, communicating with five others at the bottom of the general cavity: opercle rudimentary: the vomer alone present to represent the upper jaw.

72. Chimaera

Body elongated: snout conic, marked with lines of pores: jaws armed with hard plates instead of teeth; four above and two below: between the eyes a fleshy process, bent forwards, and terminating in a cluster of small spines: first dorsal armed with a strong spine; placed above the pectorals: second dorsal commencing immediately behind the first, and, reaching to the end of the tail, which terminates in a long filament.