Cyclothone, 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

CYCLOTHONE , new genus.

Numerous small specimens, in very bad condition, were received, belonging to an undescribed genus of the family Sternoptychidœ, or of some closely related family not vet defined.

Diagnosis. - Body long, somewhat compressed, apparently naked, covered with dark pigrnent-cells, there being 110 scales. A series of luminous spots along the lower sides of the body. Head conical, cleft of mouth very wide, oblique, the lower jaw strongly projecting. The maxilla is long and slender, anteriorly curved strongly upward, its outline sickle-shaped, closely connected with the short intermaxillary. Maxillary and intermaxillary with a single series of rather large acicular teeth, about every fourth one in the maxilla longer than the average. Lower jaw with teeth apparently uniform in size, raking forward, and with a few canines in front. A small patch of minute teeth upon the head of the vomer. Palate smooth. Eve moderate, inconspicuous, apparently covered with opaque membrane, causing a dull appearance. Gill opening very wide, the branchiostegal membrane free from the isthmus. Gill rakers long and slender, moderately numerous, more than twice as numerous below as above the angle.

Pseudobranchiæ absent (branchiostegals not clearly made out, apparently seven, eight, or nine). No air-bladder. All the lins well developed : the anal large : dorsal and anal fins entirely 011 the posterior half of the body : no adipose dorsal : caudal forked.