SOME FISHES OF OBDEE AMFHIPB10N IF OBMES. — WHITLEY. 215 
Very young specimens of A. percula sometimes have the areas between the 
white bands dark, but may at once be distinguished from A. bicolor by their light- 
coloured snouts and 10 dorsal spines. Andaman Islands specimens appeal to be 
referable to a subspecific form distinct from the true A. percula (vide Day, Fish. India 
1877. pp. 378 & 379, pi. lxxx, fig. 4 ; Proc. Linn. Soc. Lond. xv, 1881, p. 52 ; Faun. 
Brit. India, Fish, ii, 1889, p. 377). 
Hosts. In Queensland, Actinicola percula has been recorded from the Sea 
Anemones Stoichactis Jiaddoni and 8. Jcenti (Saville-Kent, loc. cit ., as Discosoma). 
It was commonly seen by me nestling amongst anemones’ tentacles at Low Isles, 
and less commonly at Michaelmas Cay, North Queensland, but I have never seen 
one actually inside an anemone’s stomach. 
Actinicola bicolor (Castelnau). 
(Plate XXVII, Fig. 2.) 
Amphiprion bicolor Castelnau, Proe. Zool. Aeelim. Soc. Viet, ii. May 10, 1873, p. 92. Port Darwin, 
North Australia. Type in Paris Museum. Id. Macleay, Proc. Linn. Soc. N S. Wales 
ii, Juije 1878, p. 361. 
Amphiprion percula Klunzinger, Sitzb. Akad. Wins. Wien lxxx, 1, 1879, p. 376. Not Lutjanus 
percula Lacepede. 
Amphiprion bicolor Weber & de Beaufort, Fish. Indo-Austr. Archip. i, 1911, p. 63. 
Amphiprion percula Whitley, Roe. Austr. Mus. xvi, 1, 1927, p. 24. Port Darwin specimens 
only. Not Lutjanus percula Lacepede. 
D.xi/15; A.ii/13 ; P.i/16 ; V.i/5 ; C.15. L.lat. 34 tubes. L.tr.6/1/23. 
Head (16-5 mm.) 3-1 in length to hypural joint (52). Depth (25) 2-OS in same. 
Eye (4) 4-1, interorbital (5) 3-3, and longest pectoral ray (13) 1-3 in head. 
Profile somewhat gibbous before the dorsal, slightly concave at the nape 
and convex before the eyes. Dorsal outline much more arched than ventral. Head 
higher than long, longer than broad. Preorbital notched, with a strong spine and 
two or three smaller ones ; similar spines along suborbital. Angle and lower half 
of the preoperculum serrated. Operculum, interoperculum, and suboperculum with 
long spines. Opercles scaly, scales becoming vestigial on cheeks. Nape, front of 
head, and chin naked. Lower orbital margin, preorbital, suborbital, and inframarginal 
area of preoperculum with'series of raised ridges. The nostrils are almost surrounded 
by them. Circular pores along margins of suboperculum and preoperculum and 
a "few scattered on the face. About 17 predorsal scales ; the foremost hardly reaches 
the nuchal band. Tnterorbital broad, slightly depressed mesially. Lower jaw 
slightly longer than upper. A single series of blunt teeth in each jaw. Tongue acute, 
with a blunt tip. A palatal velum present. 
Body elevated, compressed, entirely covered with small cycloid scales which 
extend a short way on to the bases of all the fins except the first dorsal and the 
ventrals. Lateral line rising sharply from over the operculum to below the first 
dorsal, whence it descends in an irregular course to terminate below the second 
dorsal. Some punctured scales on the sides of the caudal peduncle. 
Dorsal originating slightly behind the vertical of the hindmost part of the 
operculum and terminating somewhat behind the end of the anal base. The spines 
are elevated anteriorly, hut decrease in height posteriorly to form a notch before 
