ARGENTINIDAE 275 



Depth of body 6 to 6y in the length, length of head 5 J to 53. Diameter of eye 2f in 

 length of head, interocular width nearly 3, interorbital width 5]. Dorsal lo-ii ; origin 

 much nearer to end of snout than base of caudal, equidistant from former and adipose 

 fin. Anal 20-22 ; origin about equidistant from base of caudal and insertion of pelvic, 

 2|- to 3^ times as distant from end of snout as from base of caudal ; length of base 5 to 

 5f in that of fish. Pelvics lo-rayed, inserted below middle or posterior part of dorsal. 

 About 42 scales in a longitudinal series. 



Described from two specimens, 129 and 172 mm. in length, of which the larger is 

 selected as the holotype. 



Fig. 5. Bathylagus microcephalus . Holotype. (x |.) 



Hab. South Atlantic. 



This species is close to B. autarcticus, differing chiefly in the somewhat slenderer 

 body, shorter head, smaller eye and rather longer snout, and the more anterior position 

 of the dorsal fin. 



Bathylagus glacialis, Regan. 



Bathylagus antarcticus (part), Brauer, 1906, ' Valdivia' Tiefsee-Fische, p. 13, fig. 2. 

 Bathylagus glacialis (part), Regan, 1913, Trans. R. Soc. Edinb. xlix (ii), p. 231, pi. ix, fig. 2. 



St. 86. 24. vi. 26. 33° 25' 00" S, 6° 31' 00" E. 4i m. net, horizontal, 1000 (-0) m. : 3 specimens, 

 24-34 '"rn- 



St. 104. 31.X.26. 4i°33'3o"S, i7°58'oo"W. im. tow-net, horizontal, 112 m. ; i specimen, 45 mm. 



St. 239. 2. vi. 27. 46° 56' 00" S, 46° 03' 00" W. 4i m. net, horizontal, 1050-1350 (-0) m. : 2 

 specimens, i02-ii8mm. 



Depth of body 6 to 6| in the length, length of head 4 J to 4^. Diameter of eye 2|- 

 to 2j in length of head, interocular width 2f to 3, interorbital width about 6. Dorsal 10; 

 origin nearer to end of snout than base of caudal, but nearer to adipose fin than end of 

 snout. Anal 18-21 ; origin equidistant from base of caudal and insertion of pelvic or a 

 little nearer the latter, 2f to 3! times as distant from end of snout as from base of caudal ; 

 length of base nearly 6 times in that of fish. Pelvics 8- or 9-rayed, inserted below 

 middle of dorsal. 36 to 40 scales in a longitudinal series. 



Described from four specimens, 80 to 135 mm. in length, including the types of the 

 species.^ 



^ Of the five type-specimens of B. glacialis two are preserved in the British Museum collection, of which 

 one proves to belong to B. euryops. The remainder are in the Royal Scottish Museum at Edinburgh: through 

 the kindness of Dr J. Ritchie I have been able to examine these examples, and find them all identical with 

 the type of glacialis in this museum. 



