Chalinura Simula, 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 : 199-200

11. Chalinura Simula , new species.

A single specimen, 458 millimeters in length, was obtained- at Station 308. In some respects it resembles the description of Corypheenoidcs assnis, Guenther , obtained by II. M. S. “Challenger” at a depth of 1900 fathoms, east of the mouth of the liio Plata.

The most salient characters are (1.) the very large mouth, (2.) the long obtuse snout, and (3.) the very elongate first ventral ray.

The body is shaped much as in Coryphcenoides , but is rather stout, its greatest height being contained 6§ times in its total length. The back is somewhat gibbous in profile, the dorsal outline rising quite rapidly from the interorbital region to the origin of the first dorsal, whence it descends almost in a straight line to the end of the tail.

The scales are rather small, cycloid, without armature, but with indications, particularly on the head, of radiating striae. The number of scales in the lateral line is about 150, about eight rows between the origin of the dorsal and the lateral line, and 17 to 19 between that line and the origin of the anal.

The length of the head is contained about 54 times in the total length of the o m 1 r- ' I O body. The width of the interorbital area is a little greater than the long diameter of the orbit, which is equal to that of the snout. The postorbital portion of the head is about three times as long as the diameter of the eye. The length of the operculum is equal to half that of the upper jaw. The preoperculum is emarginate on its posterior limb. The orbit is nearly round, its diameter contained five tini(js in the length of the head. The snout is broad, obtuse, scarcely projecting beyond the mouth; its width nearly as great at the ti]> as that of the interorbital space or as its own length. The median ridge is very prominent, gibbous in outline when observed laterally; the lateral ridges start out alm.ost at a right angle with the median ridge, and are not continued upon the sides of the head. The suborbitals prominent, forming broad subocular ridges. No supraorbital ridges. Nostrils in front of the middle of the eye, and nearer to its anterior margin than to the tip of the snout. Barbel longer than the diameter of the eye.

Teeth in the upper jaw in a broad villiform band, with the outer series very much enlarged. The lower jaw with the teeth in a single series.

Distance of first dorsal from snout 4\ times the length of its base, its distance o O from the anterior margin of the orbit about equal to the length of the head. First spine very short, second rather stout and with a simple serration anteriorly, the seme closely appressed to the spine (the spines all broken at their tips).

The second dorsal begins at a distance from the first about equal to the length of the upper jaw.

The anal is high, its average rays being about, three times as long as those in the dorsal. It is inserted slightly behind the perpendicular from the last rav of the first dorsal. The pectoral is inserted over the base of the ventral (its rays are mutilated). The ventral is inserted almost under the pectoral, but very slightly in advance; its distance from the snout is less than the length of its longest ray, which is prolonged in a filament which extends to the base of the 18th ray of the anal fin.

Radial formula: D. I, IX, 113; A. 118; P. 20; V. 9; B. VI.

Length of adult, 481 millimeters; of young, about 25 millimeters.