REPORT ON THE DEEP-SEA FISHES. 



87 



just reaching the vent. The distance between the vent and the root of the ventrals 

 equals the length of the head, without snout. 



Light-coloured, with black margins to the vertical fins. 



Habitat. — Pacific coast of south-western South America. 



Near Magellan Strait, Station 305a; depth, 125 fathoms. Two specimens, 5 and 

 6^ inches long. 



Near Magellan Strait, Station 306a ; depth, 345 fathoms. One specimen, 6 inches long. 

 Messier Channel, Station 307 ; depth, 140 fathoms. One specimen, 9 inches long. 

 Near Magellan Strait, Station 308 ; depth, 175 fathoms. Four specimens, 5| to 7 

 inches long. 



Measurements : — 



Total length, . 



Length of the head, 



Diameter of the eye. 



Length of the pectoral tin, 



Distance of the vent from the ventrals 



Depth of the caudal peduncle. 



105 lines. 

 22 



8 „ 



15 „ 



16 „ 

 24 



Uraleptus, Costa. 



UralejDtits maraldi. 



Gculus maraldi, Eisso, Ichth. Nice, p. 123, pi vi. fig. 13. 

 Uraleptus maraldi, Costa, Faun. Napolit. Pesc, pi. xxxviia. 



„ „ Giinth., Fish., vol. iv. p. 349. 



,, ,, .Johnson, Ann. and Mag. Nat. Hist., 18G3, vol. x. p. 164. 



Not very rare in the Mediterranean and off" Madeira, and apparently an inhabitant of 

 no great depths. 



Physicuhis, Kaup. 



Physiadus et Pseudophyci)<, Gthr. 



In consequence of the discovery of several intermediate forms, a generic distinction 

 l:)etween Physiculus dalwigkii and Physiculus hacchus cannot be maintained ; and most 

 probably the transition from the perfectly developed, many-rayed ventral fin, to the 

 single filament of Phycis will be found to be so gradual, as to diminish the value of the 

 structure of this fin as a taxonomic character in these fishes. Besides the species enume- 

 rated here, others have been described (Physiculus hreviuscuhis. Rich. = Physiculus 

 hacchus, Forst, Physiculus barbatus, Gthv. = Phijsiculus pabnatus, Klunz.), but it is 

 not known whether they descend to the same depths as theii' congeners. 



