REPORT ON THE DEEP-SEA FISHES. 173 



armed with two, the maxillary with about twelve large distant teeth, the spaces between 

 them being filled with very small teeth ; lower jaw similarly armed with ten or eleven 

 large teeth. The entire cheek is covered with the enormously enlarged infraorbital. 



Common in the Mediterranean and neighbouring parts of the Atlantic, attaining a 

 length of 7 inches ; evidently a species which comes to the surface at night. 



Gonostoma elongatum (PI. XLV. fig. B). 



Gonostoma elongatum, Giinth., Ann. and Mag. Nat. Hist., 1878, vol. ii. p. 187. 



B. 11. D. 13. A. 29. P. 11. V. 7. 



The cheek is not entirely covered by the infraorbital. Dentition as in Gonostoma 

 denudatum. The height of the body is one-seventh of the total length (without caudal), 

 the length of the head two-ninths. 



Habitat. — Indian Ocean, south of New Guinea, Station 191 ; depth, 800 fathoms. 

 One specimen, 6^ inches long. 



Ofi"Bauda, Station 194a; depth, 360 fathoms. One specimen, 4| inches long. 



The height of the body is one-seventh of the total length, without caudal, the length 

 of the head two-ninths. Vent midwa)^ between the root of the caudal fin and the eye. 

 Eye rather small, two-thirds of the length of the snout, about one-eighth of the length of 

 the head, and narrower than the width of the interorbital space. Cleft of the mouth 

 exceedingly wide, the maxillary extending to the posterior angle of the praeoperculum ; 

 it is armed with about twelve large distant teeth, the interspaces being filled with small 

 teeth, the intermaxillary with two, and the mandible with about ten large teeth. The 

 infraorbital bone is dilated into a large very thin lamella, which extends backwards along 

 the upper margin of the maxillary, but covers only about one-half of the cheek. Opercular 

 bones very thin, like the rest of the bones of the head. 



The whole of the gill apparatus reminds one very much of that of an anchovy. The 

 gill-laminaj are very short, the gill-rakers long and needle-shaped. Branchiostegals 

 eleven, very short. 



The dorsal fin commences a little behind the vertical from the vent, and is higher 

 than the body underneath. Of the anal fin the anterior portion is much higher than the 

 midtUc and posterior ; it terminates at a short distance in front of the caudal. Caudal 

 fin forked. Pectoral narrow, low down on the side of the body, composed of eleven rays, 

 two-thirds as long as the head. Ventral fins nearly twice as distant from the pectorals 

 as from the vent, which they do not reach. 



Nothing can be said about the scales, as not only they are lost (if they were present), 

 but also the greater part of the skin. There are traces of scale pouches on the tail of the 



