3o6 DISCOVERY REPORTS 



Family ASTRONESTHIDAE 



A monograph of this family has been quite recently published by Regan and Trewavas 

 (1929, Ocean. Rep. Danish ' Dana'-Exped. (1920-2), v, pp. 12-30, pis. i-vi, text-figs.), 

 based largely on the material obtained by the 'Dana' in the Atlantic, Caribbean Sea, 

 and Gulf of Panama. 



Astronesthes filifer, Regan and Trewavas. 



Regan and Trewavas, 1929, t.c. p. 14, pi. i, fig. i 



St. 294. 25. viii. 27. 4° 33' 15" N, 16° 52' 45" W. I m. tow-net, oblique, 84 (-0) m. : i specimen, 

 28 mm. 70 cm. tow-net, oblique, 84 (-0) m. : i specimen, 29 mm. Young-fish trawl, 100-150 (-0) m. : 

 2 specimens, 28-31 mm. 



Hab. North Atlantic; Caribbean Sea. 



Astronesthes cyaneus (Brauer, 1902). 

 Regan and Trewavas, t.c. p. 21, fig. 14. 

 II. xi. 25. 6° 55' N, 15° 54' W. 2 m. tow-net, horizontal, 800 (-0) m. : i specimen, 42 mm. 

 Hab. Atlantic; Caribbean Sea; Indian Ocean. 



Astronesthes indicus, Brauer, 1902. 



Regan and Trewavas, t.c. p. 23, pi. ii, fig. 3. 



St. 288. 21. viii. 27. 00° 56' 00" S, 14° 08' 30" W. Young-fish trawl, 250 (-0) m. : i specimen, 

 85 mm. 



Hab. Atlantic; Caribbean Sea; Indian Ocean. 



Borostomias antarcticus (Lonnberg). 



Astronesthes antarcticus, Lonnberg, 1905, Zool. Anz. xxvni, p. 762. 



Astronectes antarcticus, Lonnberg, 1905, Wiss. Ergebn. Schwed. Siidpolar-Exped. v (6), p. 65. 



Borostomias antarcticus, Regan and Trewavas, t.c. p. 25. 



St. 114. 12. xi. 26. 52° 55' 00" S, 9° 50' 00" E. 4J m. net, horizontal, 650-700 m. : i specimen, 

 180 mm. 



Depth of body 6^ in the length, length of head 5|. Snout a little longer than eye, 

 diameter of which is 5! in length of head. Postocular luminous organ much smaller 

 than eye, apparently single, and with a slight anterior prolongation below the eye. 

 Barbel i\ times as long as head; unpigmented stem^ followed by a swollen black part, 

 which is followed by a hyaline area with a small luminous body on either side and a 

 short filariientous process; barbel ending in a globular white bulb. Maxillary with 6 or 

 7 teeth. Dorsal 12; origin just behind pelvics. Anal 15. Pelvics 7-rayed, about equi- 

 distant from end of snout and base of caudal. Photophores — in ventral series I-P 10; 

 P-V 25 ; V-A 22 or 23 ; A-C 12 : in lateral series 0-V 23 ; V-A 22. 



1 The skin may have been stripped off. 



