278 
THE CORAL TRIANGLE: HEARST BIODIVERSITY EXPEDITION 
Diaphus sp. 
Material.— CAS 236510 (34.7 mm SL); HEPD-014, beam trawl in 865-944 m. 
Remarks.— We are unable to identify this small, damaged specimen. 
Diaphus sp. 
Material.— CAS 236512 (30.0 mm SL); HEPD-016, beam trawl in 892-966 m. 
Remarks.— We arc unable to identify this specimen owing to its small size and imperfect condition, espe¬ 
cially around the snout and orbit where the luminous organs are situated. The short, deep body and arrange¬ 
ment of the lai'ge photophores on the body are somewhat similar to those chai'actei’s in D. perspicillatus 
(Ogilby, 1898). 
Hygophum proximum Becker, 1965 
Material.— CAS 236514 (41.0 mm SL); HEPD-016, otter trawl in 892-966 m. 
Remarks. — Widespread in tropical waters of the Pacific and Indian oceans. 
ILampanyctus sp. 
Material.— CAS 236507 (46.0 mm SL); HEPD-016, otter trawl in 892-966 m. 
Remarks.— The general morphology and photophore pattern of this single, damaged specimen indicate that 
it is a Lampanyctus based on the keys provided by Nafpaktitis et al. (1977: 26-29) and Nakabo (2000: 
378-399). It agrees closest with L. nobilis Taning, 1928 in Nakabo’s key. 
Myctophum obtmirostre Taning, 1928 
Material.— CAS 236515 (2, 44.3-50.8 mm SL); HEPD-016, otter trawl in 892-966 m. 
Remarks.— Worldwide in tropical seas. These specimens agree well with published descriptions of the 
species except that the luminous supracaudal (male) and infracaudal (female) organs are less developed, 
probably owing to the subadult size of the specimens. 
Taaningichthys sp. 
Material.— CAS 236517 (58.0 mm SL); HEPD-014, beam trawl in 865-944 m. 
Remarks.— We are uncertain of the identification of this single, denuded specimen, in which little evidence 
of photophores remain. The presence of supra- and infracaudal luminous glands bordered by black tissue 
and the crescent-shaped whitish tissue on the posterior half of the has led us to this genus. Bolinichthys 
also has the whitish tissue on die his, but tlie caudal luminous glands consist of overlapping scale-like bod¬ 
ies not bordered by black tissue. Body photophores are apparently absent in T. paurolychnus Davy, but we 
are uncertain of their absence in this specimen. 
Paralepididae (Barracudinas) 
Dolichosudis ? (Fig. 45) 
Material.— CAS 236706 (196 mm SL; DC-1424); HEPD-016, otter trawl in 892-966 m. 
Remarks. — We are uncertain of the genus of this barracudine. It has D 9, A 33, LL 73; a long adipose fin 
between the anus and A; V well anterior to D, which lies about midway between the origins of V and A; 
distance between D and C about 3.5 in SL; no light organs; short P; large depressible mandibular teeth in 
2 rows; and relatively compressed body. Color unifonnly medium brown. 
POLYMIXIIDAE (CAS GROUP 115) 
Polymixia berndti Gilbert, 1905 (Fig. 46) 
Material.— CAS 235791 (125 mm SL, DC-1432); HEPD-017, beam trawl in 282-428 m. CAS 235819 (3, 
130-147 mm SL, DC-1567); HEPD-036, beam trawl in 216-262 m. 
Remarks.— The HEPD specimens agree for the most part with descriptions in Heemstra {in Smith and 
Heemstra, 1986:432, fig. 134.1) and Nakabo (2000: 407), although the snout tip does not extend beyond 
