138 PROF. R. com:TT on a [Mar. 2, 



1. On a new Pediculate Fish from the Sea off INIadeira. 

 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. uov. (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 Avith 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 tlie end 

 cleft and provided with small papillae. Colour uniformly black, the 

 top of the ccfihalic 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. 



IlaLitat. One specimen, total length 49 millim., from the sen 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 s;reatest depth of the head ..... 19 



The depth of the head from the base of the orbital spine . . 10 



