STERNOPTYCHIIDAE 303 



Argyropelecus hemigymnus, Cocco.^ [PI. II, fig. 4.] 



Cocco, 1829, Giorn. Sc. Sicil., fasc. 77, p. 146; Brauer, 1906, ' Valdivia' Tiefsee-Fische, p. 106, 

 fig. 45; Regan, 1908, Trans. Linn. Soc. Zool. xii, p. 219; Zugmayer, 191 1, Res. Camp. Sci. 

 Monaco, xxxv, p. 51; Holt and Byrne, 1913, Fisheries, Ireland, Sci. Invest. 1912, i, p. 21, 

 figs. 7 Z> and 8; Pappenheim, 1914, Deutsche Sildpolar-Exped. xv, Zool. vii, p. 182; Jespersen, 

 1915, Rep. Danish Ocean. E.xped. 1908-10, 11, A, 2, p. 7; Roule, 1919, Res. Camp. Sci. Monaco, 

 Lii, p. 25; Barnard, 1925, Ann. S. Afric. Mus. xxi, p. 153; Jespersen and Taning, 1926, Rep. 

 Danish Ocean. Exped. 1908-10, 11, A, 12, p. 48. 



Stemoptyx mediterranea, Cocco, 1838, Oss. pesci Messina {II Faro, iv), p. 7. 



} Argyropelecus d'urvillei, Cuvier and Valenciennes, 1850, Hist. Nat. Poiss. xxii, p. 405. 



} Argyropelecus intermedins, Clarke, 1878, Travis. Proc. N. Zealand Inst, x, p. 244, pi. vi. 



? Argyropelecus heathi, Gilbert, 1905, Bull. U.S. Fish. Conim. xxiii (1903), p. 601, pi. Ixxii, 



fig. I. 



The 'Discovery' obtained 57 examples of this species from the following stations in 

 the South Atlantic, at depths ranging from 0-2500 m., measuring from 9 to 34 mm. in 

 length: St. 3, 81, 83, 85, 86, 87, 89, 100, 257, 258, 267. 



Hab. Mediterranean ; Atlantic ; Indian Ocean ; Hawaiian Islands (?); New Zealand (?). 



Argyropelecus aculeatus, Cuvier and Valenciennes. 



Cuvier and Valenciennes, 1850, Hist. Nat. Poiss. xxii, p. 406; Giinther, 1864, Cat. Fish, v, 

 p. 386 ; Sauvage, i8gi. Hist. Madagascar, xvi, Poissons, p. 483, pi. xlviii, fig. 5 ; Liitken, 1892, Vid. 

 Selsk. Skr. (6), vn, p. 282 ; Goode and Bean, 1895, Ocean. Ichth. p. 127 ; Collett, 1903, Christiania 

 Vid. Selsk. For. No. 9, p. 108; Brauer, 1906, ' Valdivia^ Tiefsee-Fische, p. no, fig. 47; Murray 

 and Hjort, 1912, Depths of the Ocean, p. 612; Jespersen, 1915, Rep. Danish Ocean. Exped. 

 1908-10, n. A, 2, p. 27. 



Sternoptyx acanthurus, Cuvier and Valenciennes, 1850, Hist. Nat. Poiss. xxii, p. 408. 



Sternoptychides aniabilis, Ogilby, 1888, Proc. Linn. Soc. N.S. Wales (2), ni, p. 13 13. 



? Argyropelecus canimis, Garman, 1899, Mem. Mus. Comp. Zool. xxiv, p. 235. 



Argyropelecus aniabilis, McCuUoch, 1923, Rec. Austral. Mus. xiv, p. 118, pi. xiv, fig. 3. 



St. 89. 28. vi. 26. 34° 05' 15" S, 16° 00' 45" E. Young-fish trawl, 1000 (-0) m. : 5 specimens, 

 9-55 mm. 



St. 257. 24. vi. 27. 35° 01' 00" S, 10° 18' 00" E. Young-fish trawl, 250 (-0) m. : 2 specimens, 

 15-25 mm. 



St. 259. 26. vi. 27. 34° 59' 00" S, 16° 39' 00" E. Young-fish trawl, 370-450 (-0) m. : 2 specimens, 

 14-19 mm. 



Hab. Atlantic; Indian Ocean. 



The adults of this species may be readily distinguished from those of A. olfersii by 

 the serration of the dorsal and abdominal ridges, and by the double series of spines on 

 the lower surface of the caudal peduncle. Neither of these characters is apparent in 

 young or half-grown examples, which may be recognised, however, by the shape of the 

 body and the form of the abdominal spine. 



1 For full synonymy of this species see Brauer (1906) 



6-2 



