12 SYMBRANCHIATE AND APODAL FISHES 
16. macrura, Bleeker, Nat. Tijdschr. Nederl. Ind., vii, 1854, p. 354; 
Anjer, Java; Moreton Bay. 
v. Ecurpna, Forster, Enchiridion, p. 31, 1778 — (variegata). 
17. nebulosa, Ahl, in Thunberg’s Dissert. de Mur. et Oph., p. 5, pl. i, fig. 2, 
1789. Torres Straits ; Lord Howe Island. 
18. polyzont, Richardson, Voy. Sulphur, Ichth. p. 112, pl. iv, fig. 11—14, 
1874; Torres Straits. 
vi. Unoprerycius, Riippell, Neue Wirbelth. Abyss., Fische Roth. 
Meer., p. 83, 1838 (concolor). 
19. concolor, Ruppell, ibid., pl. xx, fig. 4; Cape York, Queensland. 
RHABDURA, nom. nov. 
shane: Bleeker, Atl. Ichth., iv. p. 110, 1864 (macrurus). Not Kaup, 
1856. 
Body exceedingly elongate and slender slightly com- 
pressed. Lateral line rather conspicuous, composed of 
short, separate tubes. Head small, its upper profile feebly 
convex, with short, pointed snout. Mouth with wide hori- 
zontal cleft, extending far beyond the eye, the jaws sub- 
equal; lips smooth. Teeth acute, compressed, well separ- 
ated, biserial in the jaws, uniser al on the vomer; all the 
enlarged anterior teeth depressible. Anterior nostrils tu- 
bular, the posterior simple. Eyes small, anterior. Gill- 
openings situated below the median line of the trunk, large 
and crescentic.’ Vertical fins low, the dorsal originat- 
ing about midway between the gill-opening and the angle 
of the mouth. Vent close in front of the anal fin. Tail very 
long, much longer than the head and trunk. (p70 fdos, a 
rod or wand; oip¢, tail: in reference to its exceedingly 
long and slender tail.) 
From the Cape of Good Hope to Eastern Australia, 
For reasons given below I find myself compelled to 
propose a new name for the moray to which Bleeker ar- 
bitrarily restricted Kaup’s genus Thyrsoidea. 
In my view of the case the type of Kaup’s hetero- 
geneous genus is his Thyrsoidea macrops (=Gymnothorax 
makassariensis, Bleeker), this being the first species de- 
scribed by that author under his new generic name, and no 
5T have here described the shape of the gill- openings as figured by 
Bleeker and Day, to both of whom the species was well-known, and 
who were unlikely to make a mistake; in my example, however, they 
form a straight horizontal slit on each side, resembling the gash of a 
knife. Possibly this may be an individual peculiarity. 
