ARGENTINIDAE 273 



** Depth of body 5 to 5I in length; anal usually with 19 to 25 rays. 



f Head 43 to 4I in length of fish ; eye 25 to 23 in head, equal to or less than post- 

 orbital part of head; anal with 22 to 25 rays, length of base 4I to 5 J- in that of 

 fish. 7. antarcticus, Giinther, 1878 



ff Head 4I to 4 J in length of fish; eye a little more than 2 in head, greater than 

 postorbital part of head ; anal with about 19 rays, length of base 5! to 5I in that 

 offish. 8. benedicti, Goode and Bean, 1895 



fff Head 4 to ^^\, in length of head; eye 2\ to 2J in head; anal with (16) 19 rays. 



9. pacificus, Gilbert, 1890 



b. Origin of anal 3 J to 3I times as distant from end of snout as from base of caudal; 



base of fin 6j to 6| in length of fish. 10. euryops, Goode and Bean, 1895 



Bathylagus argyrogaster, n.sp. 



St. 268. 25. vii. 27. 18° 37' 00" S, 10° 46' 00" E. I m. tow-net, oblique, 73 (-0) m. : i specimen, 

 62 mm. Young-fish trawl, 100-150 (-0) m. : 3 specimens, 40-81 mm. 



St. 269. 26. vii. 27. 15° 55' 00" S, 10° 35' 00" E. 4o m. net, horizontal, 600-700 (-0) m. : 2 

 specimens, 68-99 '^n''- 



St. 276. 5. viii. 27. 5° 54' 00" S, 1 1° 19' 00" E. Young-fish trawl, 150 (-0) m. : i specimen, 34 mm. 



St. 284. 15. viii. 27. 2° 13' 00" S, i°52'oo"E. i m. tow-net, oblique, 71 (-0) m. : i specimen, 

 75 mm. 



St. 285. 16. viii. 27. 2° 43' 30" S, 00° 56' 30" W. 4J m. net, horizontal, 125-175 (-0) m. : 5 

 specimens, 23-115 mm. 



St. 288. 21. viii. 27. 00° 56' 00" S, 14° 08' 30" W. Young-fish trawl, 250 (-0) m. : i specimen, 

 30 mm. 



28. X. 25. 13° 25' N, 18° 22' W. 4! m. net, horizontal, 900 (-0) m. : i specimen, 46 mm. 



Depth of body 4I to 5I in the length, length of head 3|- to 41. Diameter of eye 2\ 

 to 2| in length of head, interocular width about 3, interorbital width about 5. Dorsal 



Fig. 4. Bathylagus argyrogaster . Holotype. (x i.) 



12; origin equidistant from base of caudal and anterior part or middle of eye. Anal 

 14-15 (? 16); origin about equidistant from base of caudal and insertion of pelvic or 

 nearer the latter, 3^ to 4 times as distant from end of snout as from base of caudal; 

 length of base 7 to nearly 8 times in that of fish. Pelvics 8-rayed, inserted below middle 

 of dorsal. About 39 scales in a longitudinal series. Brownish above, silvery below; 

 operculum silvery black. 



Described from several specimens, up to 115 mm. in length. The largest example 

 from St. 285 is selected as the holotype. 



