Cyclothone lusca, Goode, G. B. & Bean, T. H., 1883

Goode, G. B. & Bean, T. H., 1883, Reports on the results of dredging under the supervision of Alexander Agassiz, on the east coast of the United States, during the summer of 1880, by the U. S. coast survey steamer “ Blake, ” Commander J. R. Bartlett, U. S. N., commanding., Bulletin of the Museum of Comparative Zoology at Harvard College 10 (5), pp. 183-226 : 221-222

41. Cyclothone lusca , new species.

Body elongate, its greatest height contained 7§ times in its length to base of middle caudal rays, its width being less than two thirds of its height. Its height at the ventrals is contained 8-£ times in standard length the least height of tail is half that of the body at the ventrals.

Head length contained 4| times in body length, its width about one third of its length. The intermaxillary is very short, extending to vertical from posterior limb of anterior nostril. The maxillary is very strongly curved downward, and has a short knob at its anterior extremity, not visible without dissection. The maxillary extends backward to a distance from the tip of the snout equal to the length of the head without the snout. The peculiar arrangement ot the teeth is described above in the generic diagnosis. Most of those in the maxillarv are inclined stronidv forward.

The long lower jaw with the exception of the projecting tip, is included within the upper jaw : its length is equal to the distance from the anterior nostril to the end of the head.

Eye circular, close to the profile, the interorbital area being very narrow. Its length is equal to that of the snout, and contained seven times in the length of the head.

Dorsal fin inserted at a distance from the tip of the snout equal to three times the length of the lower jaw, its base being as long as the head ; the first ray is minute, and about two thirds as long as the eye ; the second ray is about two thirds the length of the base of the fin, and the subsequent rays rapidly and uniformly decrease in length to the last, which is about twice as long as the first. All the rays except the first are bifid.

The anal fin is inserted under the second ray of the dorsal: its base is half as long again as that of the dorsal, and nearly one third as long as the body of the fish : its outline resembles that of the dorsal, though slightly emarginate, its longest ray a little longer than the longest of the dorsal, and half as long as the base of the fin. All the rays except the first are bifid.

Caudal forked, its middle rays less than half as long as the outer rays, equal in length to least height of caudal peduncle.

Pectoral inserted under the tip of the opercular flap, its length equal to the greatest height of the body.

Ventral inserted at a distance from the snout equal to twice the length of the head, its length slightly exceeding that of the pectoral, and contained seven times in the standard body length.

Radial formula : B. VII to IX ; D. I, 11 ; A. I, 16 ; C. 17 ; P. 10 ; V. 5.

Color blackish brown, the luminous pores inconspicuous.

Specimens were obtained at the following stations.