5a. Gill rakers 6-8 + 1 + 12-17; supracaudal gland shorter than infracaudal gland; mesoptery- 

 goid teeth uniformly small 6 



5b. Gill rakers 3-5 + 1 + 8-10; supracaudal gland equal in length to or somewhat longer than 

 infracaudal gland; posterior mesopterygoid noticeably enlarged L. urophaos 



6a. Distance between posterior end of base of anal fin and anterior margin of infracaudal 

 gland equal to, or slightly greater than, length of this gland. Photophores small; those of 

 the AOa series about one diameter apart (about two diameters in specimens of less than 30 

 mm). First and usually second AOp in front of infracaudal gland; AOa level; gill rakers 6-7 

 + 1-1- 12-14, total 19-22 L. speculigera 



6b. Distance between posterior end of base of anal fin and anterior margin of infracaudal 

 gland equal to about one-fourth of length of this gland; photophores large. AOa in- 

 terspaces about 1.5 times the diameter of a photophore (less than one diameter in speci- 

 mens less than 30 mm). All AOp well over infracaudal gland; last AOa usually distinctly 

 raised above level of rest of organs of same series; gill rakers 7-8 -I- 1 + 16-17, 

 total 24-26 L. notialis 



Lampadena luminosa 



(Garman, 1899) 



/ \ 



\ 



7 



Fig. 138 — Lampadena luminosa, 67.4 mm. From Nafpaktitis and Paxton (1968, p. 5, 



fig. 1). 



Description 



D. 15; A. 14 (13-14); P. 16 (15-17); AO 5-6 (7) + 2; Pre 2+1; gill rakers 4+1 + 9 (8-10), 

 total 14 (13-15); PO 5; VO 4-5; vertebrae 36 (37) (8 specimens); lateral line scales 35-37. 



Pterotic spine prominent, directed posteriorly. Supracaudal and infracaudal luminous 

 glands of about equal length, slightly less than orbital diameter; distance between anterior 

 end of infracaudal gland and posterior end of anal base about equal to or slightly less than 

 length of gland. /ly P 



SJ2e.- To 150 mm (off Japan). /^ • 



Least depth of capture: To 60 mm at night and to 555 m in daylight. Clarke (1973) reported 

 "large" fish taken mostly between 150-250 m at night but between 650-750 m in daylight in 

 Hawaiian waters. 



Distribution: This species has been reported primarily from the warmer waters of the 

 Atlantic and Indian Oceans; one specimen is known to me from the eastern Pacific, 04°56' N, 

 142°54' W. 



151 



