MYCTOPHIDAE 323 



maxillary truncate, a little behind posterior edge of eye. Dorsal 13-14; origin well 

 behind root of pelvic. Anal 19-21 ; origin nearly below middle of dorsal. Pectoral 13-15. 

 Pelvic 8. About 40 scales in the lateral line. PLO photophore on lower part of pectoral 

 base. 2 PVO, close together and one above the other, forming a right-angle with PLO. 



5 PO, the last very little elevated. VLO nearer pelvic fin than lateral line. 4 VO, all 

 level. 3 SAO, forming an obtuse angle, interspace between first and second a little 

 greater than that between second and third. AO 17-18, almost in a straight line, 4 

 behind last anal ray. No Pol. 2 Pre, rather close together, the second a little elevated. 



6 or 7 luminous scales on upper edge of caudal peduncle, or 5 on the lower edge. 

 Described from several specimens, 35 to 95 mm. in length, including the types of the 



species. 



Hab. Circumpolar in southern seas. 



Fig. 28. Myctophum antarclicum. (x i.) 



Myctophum subasperum (Giinther). 



Scopelus subasper, Giinther, 1864, Cat. Fish, v, p. 411 ; Liitken, 1892, Vid. Selsk. Skr. (6), vii, 

 p. 240, fig. I. 



Myctophum niegalops, Peters, 1865, Monatsber. Akad. Beilin (1864), p. 393. 

 ? Scopelus colletti, Liitken, 1892, t.c. p. 249, fig. 7. 

 } Benthosema colletti, Goode and Bean, 1895, Ocean. Ichth. p. 78. 

 Dasyscopelus subasper, Goode and Bean, 1895, t.c. p. 92. 



Myctophum {Myctophum) subasperum, Brauer, 1906, 'Valdivia' Tiefsee-Fische, p. 175, fig. 87. 

 Myctophum antarcticum, Gilbert, 191 1, Bull. Ainer. Mus. Nat. Hist, xxx, p. 13; Regan, 1914, 

 Fishes ' Terra Nova', p. i ; Waite, 1916, Fish. Austral. Antarct. Exped. p. 59, pi. iv, fig. 2, text- 

 fig- 13- 

 Myctophum subasperum. Parr, 1928, Bull. Bingham Ocean. Coll. m (3), p. 58. 



St. 78. 12. vi. 26. 35° 18' 00" S, 19° 01' id" W. Young-fish trawl, 1000 (-o)m. : 19 specimens, 

 17-23 mm. ? 



St. 104. 31. X. 26. 41° 33' 30" S, 17° 58' 00" W. I m. tow-net, horizontal, 0-5 m. : i specimen, 

 32 mm. 



Close to M. antarcticum. Depth of body 3! to 4^ in the length, length of head 3I to 

 nearly 4. Diameter of eye 2^ to 2| in length of head. Posterior margin of maxillary 

 rounded, the maxillary scarcely extending beyond hinder edge of eye. Dorsal 13-14. 

 Anal 21-22; origin below posterior part of dorsal. Pectoral 16 {}). Pelvic 8. 38 to 40 

 scales in the lateral line; those on the upper part of the body in adults with deeply 

 crenulated edges, giving them a ctenoid appearance. PVO more widely separated and 



