GONOSTOMATIDAE 295 



from eye and base of caudal. Anal 26-29 '■> origin below sixth ray of dorsal. Pectoral with 

 9 rays. Pelvic 7; origin equidistant from tip of lower jaw and posterior part of anal. 

 Lower series of photophores consisting of 9 in front of pectoral, 15 from pectoral to 

 pelvic, 9 from pelvic to vent, and 22 from vent to base of caudal; there are 43 

 (11 + 10 + 22) photophores in the upper abdominal series. 



Hab. Gulf of Panama. 



Garman does not give the length of the type specimen. 



Genus Diplophos, Giinther 

 GiJnther, 1873, J. Mus. Godejfroy, u, p. loi ; 1889, Pelagic Fish. 'Challenger', p. 32. 



Related to Manducus. Form very elongate. Praemaxillary, maxillary and mandible 

 each with a single series of small unequal teeth ; 2 or 3 teeth on the vomer and a single 

 series on each palatine. Two series of conspicuous photophores on each side of the 

 abdomen, and another series along the lateral line. Dorsal 9-1 1 ; origin a little nearer to 

 end of snout than base of caudal. Anal 55-63 ; origin below dorsal. 



One or two species. 



Diplophos taenia, Giinther. 



Giinther, 1873,7. ^^"^- Godeffroy, u, p. 102, fig.; 1889, Pelagic Fish. 'Challenger', p. 32, pi. iv, 

 fig. C; Liitken, 1892, Vid. Selsk. Skr. (6), vii, p. 278, pi. 11, figs. 1-3; Goode and Bean, 1895, 

 Ocean. Ichth. p. 104; Brauer, 1906, ' Valdivia' Tiefsee-Fische, p. 89, fig. 36; Jespersen and 

 Taning, 1919, Vid. Medd. Dansk nat. For. lxx, p. 224, pi. xvii, fig. 14; Gilchrist, 1922, 

 Fish. Mar. Biol. Stirv. S. Afr. 11, Spec. Rep. ni, p. 55; Barnard, 1925, Ann. S. Afric. Mus. xxi, 

 p. 149. 



? Diplophos pacificus, Giinther, 1889, Pelagic Fish. 'Challenger', p. 33, pi. iv, fig. B; Goode and 

 Bean, 1895, Ocean. Ichth. pi. xxxiv, fig. 126. 



St. 297. 28. viii. 27. 12° 08' 00" N, 20° 53' 30" W. Young- fish trawl, 200-300 (-0) m. : i 

 specimen, 32 mm. 



Depth of body 10 to 16 in the length, length of head 6 to 7. Snout longer than 

 eye, diameter of which is 5 to 6 in length of head and about equal to interorbital 

 width. Dorsal 9-1 1. Anal 55-63. Pectoral with 8 or 9 rays. Pelvic 8; origin about 

 equidistant from tip of lower jaw and middle of anal. Lower series of photophores 

 consisting of 104- 112, upper series of 69-73; there are about 94 photophores in the 

 lateral line. 



Described from 5 specimens, 32-44 mm. in length, including the type of the 

 species. 



Hab. Atlantic; coast of Natal; Indian Ocean; (?) Pacific. 



The counts of dorsal and anal rays, and of the serial photophores, given above are 

 only approximate, as all my material is of small size. 



In view of the variation recorded for D. taetiia by Brauer and others it is very doubtful 

 whether D. pacificus can be retained as a distinct species. The type is in poor condition 

 and has been mounted in glycerine as a microscopic preparation. 



