IWAMOTO & MCCOSKER: DEEP-WATER FISHES OF THE PHILIPPINE EXPEDITION271 
Hexatrygonidae (Sixgill stingrays) 
Hexatiygon bickelli Heemstra and Smith, 1980 (Fig. 11) 
Material.— CAS 233779 (female, 620 mm TL, DC-1295); HEPD-006, otter trawl in 454-457 m. 
Remarks. — This species was originally described from South Africa, but subsequently recorded from Japan, 
Austraha, Hawaii and waters adjoining these areas. It is occasionally sold in fish markets in Taiwan. 
Halosauridae (Halosaurs) 
Aldrovandia phalacra (Vaillant, 1888)? (Fig. 12) 
Material.— CAS 236021 (213+ mm TL [tail tip missing], DC-1427); HEPD-016, otter trawl in 892-966 m. 
Remarks. — This specimen agrees fairly closely ith. Aldrovandia oleosa Sulalc, 1977 in its dark overall col¬ 
oration, but the development of, and interspace between, the palatine tooth patches, and the spacing 
between them and tire pteiygoid tooth patches is narrower, the lateral-line scale count appeal's to be liigh- 
er (scales all lost and scale pockets not well defined), and the gill-raker count at 24 total (5+1+18) is slight¬ 
ly higher (cf 19-23). The branchiostegal-ray count of 10 is lower than in A. phalacra (11-13) and agrees 
more with that in A. oleosa (9-11). A. phalacra has been recorded from the Indian Ocean and the Hawai¬ 
ian Islands, but so far as we can deteraiine, not in the western Pacific. If the HEPD specimen is coraectly 
identified as that species, it will represent a first record for these waters. 
Muraenidae (Moray eels) 
Gymnothorax cf. johnsoni (Smith, 1962) (Fig. 13) 
Material.— CAS 236625 (3, 440-620+ mm TL, DC-1310-1312); HEPD-008, traps in 203-252 m. 
Remarks.— The deepwater white-spotted species of Gymnothorax requires proper analysis. Our specimen is 
closely related to two or more other white-spotted species, including G. elegans Bliss, 1883 and G ising- 
teena (Richardson, 1845), and cannot be identified with certainty. The three CAS specimens are similar to 
the holotype of Lycodontis johnsoni and have a MVF of 5-59-145, total 141-146. The type of G johnsoni 
has 5-55-139. Miiraena stellifer (Richardson, 1848) may be a senior synonym of Gymnothorax johnsoni 
or a junior synonym of Gymnothorax pmctatus Bloch and Schneider, 1801; and Gymnothorax albomacu- 
latiis Bliss, 1883 may be a synonym of G elegans (see Bohlke and Smith 2002). This species complex 
requires revision. 
A 585 mm SL specimen of what appears in a photograph to be this species was purchased in a Dumaguete 
fish market by a Philippine student, Abner Bucol, who is in contact with McCosker about Philippine eels. 
Gymnothorax cf. nuttingi Snyder, 1904 (Fig. 14) 
Material.— CAS 236626 (female, 748 mm TL, DC-1318); HEPD-008, traps in 203-252 m. 
Remarks.— This deepwater moray is currently reported only from the Hawaiian Islands. Our specimen dif¬ 
fers in coloration from that of Hawaiian specimens (see Bohlke and Randall 2000:246), but does not dif¬ 
fer in morphometries and dentition. It does differ in its vertebral counts (PI 5-68-148 vs. MVF of 6 spec¬ 
imens from Hawaii 6-71-160, total 157-165). We are hesitant to describe this as a new species until tis¬ 
sue from Hawaiian specimens can be made available for comparison to that of our Pliilippine specimen. 
Synaphobranchidae (Cutthroat eels) 
Dysomma anguillare Barnard, 1923 (Fig. 15) 
Material.— CAS 235128 (557 mm TL and CAS 235465 (5, 525-540 mm TL); HEPD-002, traps in 
146-203 m. CAS 235129 (2,517-575 mm TL); HEPD-018, traps in 240-262 m. CAS 23 5465 (2,525-540 
mm TL); HEPD-038, traps in 355-368 m. 
Remarks. — Tliis is a circumglobal species. 
Synaphobranchus kaupii Johnson, 1862 (Fig. 16) 
Material.— CAS 235497(365 mm SL, DC-1381); HEPD-012, beam trawl in 721-761 m. CAS 235454 (535 
mm SL, DC-1423) and CAS 235499 (535 mm SL, DC-1423); HEPD-016, otter trawl in 892-966 m. CAS 
235498 (405 mm SL, DC-1500); HEPD-023, traps in 578-710 m. 
