; 



REPORT ON THE DEEP-SEA FISHES. 141 



_i^ and tail colourless ; sides of the head aud abdomen silvery ; lower parts to the vent 

 I black. 



I I have examined a young specimen from Nice, 5 J inches long; GigUoli's specimen 



> seems to have been of about the same size. 



There can be no doubt that this is a juvenile form, and if it were not for the dentition 

 I should not hesitate to refer it to Macrurus lasvis, with which it agrees in several 

 important characters. However, this relationship, if it does exist, cannot be proved at 

 present without the evidence of a much more complete series than is at my disposal. 



Subgenus Lionurus, 

 Macrurus Jilicauda (PL XXXIV. fig. B). 



Coryphxnoides filicauda, Giinth., Ann. and Mag. Nat. Hist., 1878, voL xx. p. 27. 

 D. 11. P. 20. V. 9. Ccec. pyl. 7. , 



Snout considerably projecting beyond the mouth, pomted in the middle; it is twice 

 as long as the eye, which is unusually small, only half as wide as the interorbital space. 

 Mouth rather wide, extending beyond the centre of the eye. Upper teeth villiform, 

 in a very narrow band, those of the mandible very small, biserial. Barbel minute. 

 Prseoperculum with the angle produced backwards, broadly rounded and crenulated on 

 the margin. The terminal portion of the tail is prolonged into a long filament, more 

 slender than in any of the other species. Bones of the head soft. 



Scales of moderate size, thin, cycloid and deciduous; six or seven in a transverse 

 series between the first dorsal spine and the lateral line; snout and inferior half of the 

 infraorbital region naked. The second dorsal spine slender, with the barbs in front very 

 inconspicuous and sometimes entirely absent. The distance between the two dorsal fins 

 is less than the length of the head. The outer ventral ray produced into a short filament. 

 Distance between vent and isthmus less than the length of the head. 



Head and trunk whitish, tail brownish, lower part of the head and gill-openicg 

 black. 



Habitat. — Deep-sea on both sides of the South American Continent; Antarctic Ocean. 



Station 325; depth, 2650 fathoms. Three specimens, 12, 10, aud 6 inches long. 



Station 323; depth, 1900 fathoms. One specimen, 13^ inches long. 



Station 299; depth, 2160 fathoms. One specimen, 15 inches long. 



Station 158; depth, 1800 fathoms. Two specimens, 13 inches long. 



Station 157; depth, 1950 fathoms. Three specimens, 9| inches long. 



Station 146; depth, 1375 fathoms. Twelve specimens, 4 to 8 inches long. 



