342 



DISCOVERY REPORTS 



St. 76. 5. vi. 26. 39° 50' 30" S, 36° 23' 00" W. 4^ m. net, horizontal, 1500 (-0) m. : i specimen, 

 240 mm. 



St. 151. 16. i. 27. 53° 25' 00'' S, 35° 15' 00" W. 4I m. net, horizontal, 1025-1275 m. : 2 

 specimens, 100-220 mm.^ 



Hab. South Atlantic (south of 39°); Antarctic. 



The characteristic strong antero-lateral canines of this species are not developed in 

 specimens under 135 mm. in length. 



Order ALLOTRIOGNATHI 

 Family STYLOPHORIDAE 



Stylophorus chordatus, Shaw. 



Shaw, 1791, Trans. Lin?i. Soc. i, p. 90, pi. vi; Starks, 1908, Bull. Mus. Comp. Zool. lii, p. 17, 

 pis. ; Regan, 1924, Proc. Royal Soc. B, 96, p. 193, figs. 



St. 276. 5. viii. 27. 5° 54' 00" S, 11° 19' 00" E. Young-fish trawl, i5o(-o)m. : i specimen, 

 38 mm. 



St. 296. 26. viii. 27. 8° 12' 00" N, 18° 49' 00" W. Young-fish trawl, 450-500 (-0) m. : i specimen, 

 185 mm. 



Fig. 36. Young specimen of Stylophorus chordatus. (;< 2I.) 



Hob. Atlantic; West Indies; south of Galapagos Islands. 



In his diagnosis of this species Regan states that there are no pelvic fins, but an 

 examination of the small specimen obtained by the ' Discovery ' shows that these are 

 present, and that each has the form of a single ray lying below the hinder part of the 

 base of the pectoral fin. This is very fragile and is wanting on one side of the fish, and 

 there is little doubt that these structures have been broken off in all the specimens 

 previously studied. 



Order BERYCOMORPHI 

 Family DIRETMIDAE 



Diretmus argenteus, Johnson. 



Johnson, 1863, Proc. Zool. Soc. p. 403, pi. xxxvi, fig. 2; Giinther, 1887, Beep-Sea Fish. 'Chal- 

 lenger', p. 45; Goode and Bean, 1895, Ocean. Ichth. p. 211, fig. 234; McCulloch, 1909, Rec. 

 Austral. Mus. vn, p. 320; Zugmayer, 191 1, Res. Camp. Set. Monaco, xxxv, p. 107, pi. v, fig. 7; 

 Roule, 191 9, ibid, lh, p. 52. 



^ Tail incomplete. 



