The greatest depth, which occurs beneath the origin of the dorsal fin, is about one-fourth of the total length, and the greatest thickness is just half of the above mentioned depth. The head, which comprises a little more than one-fourth of the whole fish, presents a slight concave depression above the eyes. The preopercular serrations are very small. The eyes are sub-circular, their greatest diameter entering nearly six times in the length of the head, and twice in advance of their own orbit. The hinder tip of the maxillary reaches a vertical, passing through the center of the eye. Twelve longitudinal rows of scales may be enumerated between the lateral line and the vent, ten rows on the side of the caudal trunk, and the median longitudinal row on the body contains thirty scales. The lateral line, which passes over thirty-three scales, consists of slightly branched tubes. The dorsal fin extends over a base equal to half the length of the fish, caudal fin excluded. Its soft portion falls slightly short of one-third of the whole fin. The anal fin, which is nearly half as long as the dorsal, has its hinder termination slightly more posterior. The acuminately pointed ventrals, when closely appressed to the abdomen nearly reach the anal fin. The large caudal has its posterior upper and lower angles considerably prolonged and pointed. Color purplish-brown, passing into bluish grey beneath, and obsoletely lineated longitudinally with darker. A large oblong pale diffuse spot beneath the posterior end of the dorsal fin, which is directed obliquely downward and forward. Irides silvery, tinged with yellow. The dorsal fin is pale greyish, marked anteriorly with a large diffuse blue-black spot, its soft portion being tinged with reddish and margined above with yellow. The anal, ventrals and caudal are bluish-grey, the former posteriorly tinged with faded red and edged with yellow. Pectorals nearly colorless. Length, 18 inches. Habitat, Sandwich Islands. REMARKS.—We have obtained only two individuals of this large species, both of which were exposed for sale in the Honolulu fish-market. The colors, which are no doubt considerably changed, were taken from the dead fish. CHIRONECTES Cuv. 1817. _C. niger_, Garrett. D. 3-12; A. 6; V. 5; P. 10; C. 1, 7. 1.