384 DISCOVERY REPORTS 



Cyclothone rhodadenia, Gilbert, 1905, Bidl. U.S. Fisli. Comm. xxiii (1903), p. 602, pi. Ixxi, 



fig. I. 



Gonostoma polyphos, Zugmayer, 1911, Bull. Inst. Ocean. Monaco, 193, p. 4; 1911, Res. Camp. 



Set. Monaco, xxxv, p. 47, pi. ii, fig. 2; Roule, 1919, ibid, lit, p. 27. 



?.' Gonostoma rhodadenia, Weber, 1913, ' Siboga' Fische, p. 18; Weber and Beaufort, 1913, Fish. 



Indo-Ausfral. Arch. 11, p. 121. 



St. 85. 23. vi. 26. 33° 07' 40" S, 4° 30' 20" E. 4! m. net, horizontal, 2000 (-0) m. : i specimen, 

 200 mm. 



St. loi. 15. X. 26. 33° 50' to 34° 13' S, 16° 04' to 15° 49' E. 4J m. net, horizontal, 850-950 m. : 

 I specimen, 195 mm. 



St. 256. 23. vi. 27. 35° 14' 00" S, 6° 49' 00" E. Young-fish trawl, 850-1100 (-0) m. : i specimen, 

 200 m. 



St. 280. 10. viii. 27. 00° 36' 00" S, 8° 28' 00" E. Young-fish trawl, 100-200 (-0) m. : i specimen, 

 135 mm. 



St. 281. 12. viii. 27. 00° 46' 00" S, 5° 49' 15" E. Young-fish trawl, 850-950 (-0) m. : i specimen, 

 42 mm. 



St. 282. 12. viii. 27. i°ii'oo"S, 5° 38' 00" E. Young-fish trawl, 300 (-0) m. : i specimen, 

 160 mm. 



St. 285. 16. viii. 27. 2° 43' 30" S, 00° 56 30" W. 4I m. net, horizontal, 125-175 (-0) m. : 7 



specimens, 140-180 mm. 



St. 286. 17. viii. 27. 3° 06' 30" S, 3° 53' 00" W. Young-fish trawl, i25(-o)m. : i specimen, 

 55 mm. 



Depth of body 6| to 7I in the length, length of head 4f to 4^ . Snout as long as or a 

 little longer than eye, diameter of which is 6| to 7 J in length of head and i j to i^ in the 

 interorbital width. Suborbital moderately enlarged, not covering the entire cheek. 

 Vomer with a pair of conical teeth. Scales mostly wanting, but sometimes traces of 

 scales associated with photophores immediately behind the head and in the tail region. 

 About 12 gill-rakers on the lower part of the anteriorarch. Dorsal 13-15 ; origin somewhat 

 nearer to root of pectoral than base of caudal. Adipose fin well developed. Anal 29-31 ; 

 origin very little in advance of that of dorsal. Pectoral with 1 1-13 rays. Pelvic 8 ; origin 

 much nearer to tip of lower jaw than base of caudal. Photophores conspicuous; a pair 

 at the symphysis of the mandibles and a series of 8 or 9 between the branchiostegal rays ; 

 a luminous patch below the eye and immediately above the jaw, connected with a 

 photophore in front of the lower corner of the orbit ; a small indistinct spot behind the 

 end of the maxillary, and another on the upper part of the praeoperculum, the latter 

 connected with a vertical luminous streak ; one supracaudal and two infracaudal patches 

 as in the preceding species ; lower series of photophores on body consisting of 4 in front 

 of the pectoral fin, 1 1 from pectoral to pelvic, 4 from pelvic to origin of anal, and 19-22 

 from anal to base of caudal; in the upper series there are 14 or 15 (8-9-f 3-4+ 2-3). 

 Uniformly blackish. 



Described from 16 specimens, 55 to 200 mm, in length, including the types of the 

 species. 



Hab. North and South Atlantic; Indian Ocean; Hawaiian Islands. 



