216 
MEMOIRS OF TEE QUEENSLAND MUSEUM. 
the eleventh longer spine which precedes the rounded soft dorsal, whose lobe does 
not reach the vertical of the hypural joint. Anal similar in form to soft dorsal. 
Pectorals, ventrais, and caudal broadly rounded. 
Colour . — After long preservation in alcohol, the ground-colour is brownish 
black which extends on to all the fins. Three light-edged whitish bands cross the 
ground-colour. The first begins on the nape, where it joins its fellow from the other 
side, and descends behind the eye and across the operculum to taper to a point on the 
interoperculum. The second begins at the dorsal notch and crosses the body in 
the form of a broad chevron. The third traverses the caudal peduncle and. like the 
second, completely encircles the fish. A broad whitish margin to the pectoral and 
remains of what were probably white marginal bands in the young are still to be seen 
near the tips of some of the dorsal and caudal rays. 
Described and figured from a specimen, 68 mm. in total length, from the 
type-locality. Port Darwin, North Australia (Austr. Mus. Begd. No. A. 4834) ; 
collected on a coral reef by Alexander Morton in 1879. 
Variation. — Besides the specimen dealt with above, there arc three specimens 
of Actinieola bicolor in the Australian Museum. One was collected by Morton at 
the same time as the described specimen ; the others were collected at Port Darwin 
by Messrs. Christie and Godfrey. Tn the smallest (38 mm. long), the second white 
cross-band includes five dorsal spines and is produced backwards superiorly to form 
a broad white margin to the soft dorsal. The anal lobe and the caudal fin are also 
margined with white. These conditions are also met with in a specimen of 54 mm. 
The relative widths of the cross-bands vary in individual specimens. The raised 
ridges on the head are not found in the young, but there are additional ridges on 
the interoperculum of my largest specimen (73 mm.). 
Locality and Known Range. — Port Darwin, North Australia. 
Affinities. — Very closely allied to Actinieola percula (Lacepede), but with eleven 
dorsal spines, and the face, ventrais, and areas between the cross-bands uniformly 
dark. 
The original description of this species, by Castelnau, is probably inaccurate 
in such details as fin-formulae. 
PHALEPEBUS. gen. nov. 
Orthotype. — Prochilus alkallopisos (Bleeker). 
Prochilus akallopisus Bleeker 25 is distinguished from Amphiprion and 
Actinieola by its increased number (19-21) of dorsal rays and the absence of 
transverse bands. It was originally described 26 as Amphiprion akallopisos. 
Amphiprion nigripes Began 2 ' from the Maidive Islands is apparently congeneric. 
25 Bleeker, Natuurk, Verh. Holl. Maatsch. Wetensch. (3) ii, 6, 1877, pp. 22 & 35 ; Atl. 
Ichth. ix, 1877, pi. cccc, fig. 3. 
26 Bleeker, Nat. Tijdschr. Ned. Ind. iv, 1853, p. 281. Priaman. 
27 Regan, Trans. Linn. Soc. Lond. xii, 1908, p. 230, pi. xxiv, fig. 2. 
