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Show 138 PROF. R. COLLETT ON A [Mar. 2, 1. On a new Pediculate Fish from the Sea off Madeira. By ROBERT COLLETT, C.M.Z.S. [Eeceived February 12, 1886.] (Plate XV.) Fam. CERATIID*. LINOPHRYNE, n. gen. Head enormous ; the body slender, compressed, mouth oblique. Spinous dorsal reduced to a single cephalic tentacle, the basal part of which is erect, not procumbent. Teeth in the jaws, on the vomer, and the upper pharyngeals. Gill-openings exceedingly narrow, situated a little below the root of the pectorals. Soft dorsal and anal very short; ventrals none. Abdominal cavity forming a sac, suspended from the trunk. Skin smooth; a long tentacle on the throat. LINOPHRYNE LUCIFER, sp. nov. (Plate XV.) The head tetrahedral, with a supraorbital spine ; its length is to the total length as 1 to 2*7. Eyes small, situated high up on the side of the head. Teeth of the jaws uniserial, very long; 7 to 9 on each side in each jaw ; one or two in front longer than the others ; all are movable inwards and covered with skin. Gill-openings narrower than the diameter of the eye. Length of the intermaxillary bone is contained three times in the total length. Cephalic tentacle thick, with a large bulb ; the guttural tentacle long, with the end cleft and provided with small papillae. Colour uniformly black, the top of the cephalic tentacle and the papillae of the guttural tentacle white (phosphorescent ?). Total length of the single specimen 49 millim. 1 D. 1 ; 2 D. 3 ; A. 2 ; P. 14-15 ; C. 9. Habitat. One specimen, total length 49 millim., from the sea off Madeira (36° N. lat., 20° W . long.), May 1877 ; preserved in the Zoological Museum at Christiania. Measurements. millim. Total length to the end of the caudal fin 49 Length to the root of the caudal fin 35 Length of the head to the hind margin of the operculum. . 18 „ „ to the end of its spine 22 Length from the snout to the hinder margin of the eye. ... 9 Length to the edge of the distended abdominal sac 39 Length of intermaxillary 16 Length of lower jaw 17 Breadth of the lower jaw 4-5 The greatest depth of the head , 19 The depth of the head from the base of the orbital spine .. 10 |
