278 
PACIFIC SCIENCE, Vol. XIV, July I960 
4. Three specimens of the hybrid surgeonfish 
Acanthurus achilles X Acanthurus glauco- 
pareius, previously known only from Hull Is- 
land in the Phoenix group, were collected in 
the Tuamotu Archipelago. The life color of the 
hybrids was noted to be intermediate to the 
parent species. 
5. Acanthurus nubilus, heretofore known only 
from Celebes, was collected in Moorea, Society 
Islands, where it is not uncommon outside the 
barrier reef at depths of about 100 ft. The life 
colors are given. 
6. The acanthurids from a collection of fishes 
in the Indian Ocean by J. Morrow are reported 
on briefly. Fin-ray counts are given for Acan- 
thurus leucosternon, A. lineatus, A. tennenti, 
and Zebrasoma veliferum. 
7. Acanthurus bicommatus Smith (1955: 694) 
is a synonym of A. tennenti. A. melanosternon 
Smith (1955: 693) from East Africa and is- 
lands in the Indian Ocean is a valid species. 
8. Ctenochaetus sp. Smith (1955: 693) from 
Aldabra, Indian Ocean appears to be C. cyano- 
guttatus. 
9. Ctenochaetus magnus Randall ( 1955*7: 
155, 162) is referred to the synonymy of C. 
cyanoguttatus. 
10. The specimen from Ua Pou, Marquesas, 
reported by Fowler (1938) as Ctenochaetus 
strigosus is C. cyanoguttatus. This species is com- 
mon in the Marquesas, but C. striatus, usually 
abundant in the tropical Pacific, was not ob- 
served in this island group. 
11. The 35 mm. Ctenochaetus sp. Randall 
(1955 b: 189; 1955 d: 1 64) from the Gilbert 
Islands is a juvenile C. binotatus. This species 
is recorded from the Society Islands, and the 
juvenile and adult life colors are given. 
12. Ctenochaetus strigosus is recorded from 
the Society Islands. The young of this species 
in this island group and the Tuamotus ( but not 
in the Hawaiian Islands) are bright yellow in 
life. 
13. Ctenochaetus hawaiiensis is recorded from 
the Tuamotu Archipelago. 
14. Acanthurus olivaceus is subspecifically dis- 
tinct in the Marquesas Islands. Evidence of in- 
tergradation with the usual olivaceus form in the 
northern Tuamotus is presented. 
15. The brown Zebrasoma scopas is common 
in the Societies and Tuamotus, but extensive 
collecting and underwater observation failed to 
reveal any of the yellow Z. flavescens in these 
islands. 
16. The range of Zebrasoma ro stratum is ex- 
tended to include the Marquesas Islands, Caro- 
line Atoll (10° S, 150° W.), and Palmyra in 
the Line Islands. 
17. Two specimens of Naso rigoletto, known 
previously only from East Africa, were obtained 
in Tahiti, Society Islands. 
18. The following surgeonfishes are here 
recorded from the Marquesas for the first time: 
Acanthurus pyro ferns , A. olivaceus, A. achilles, 
A. gut tat us, A. nigroris, A. xanthopterus, A. 
bleekeri, Ctenochaetus strigosus, and Naso uni- 
cornis. 
REFERENCES 
Eibl-Eibesfeldt, I. 1955. Uber Symbiosen, Pa- 
rasitimus und andere besondere zwischenart- 
liche Beziehungen tropischer Meeresfische. Z. 
Tierpsychol. 12(2): 203-219, 22 figs. 
Fowler, H. W. 1938. The fishes of the George 
Vanderbilt South Pacific Expedition, 1937. 
Acad. Nat. Sci. Philad. Monogr. 2: iii + 349 
pp., 12 pis. 
Herre, A. W. 1927. Philippine surgeonfishes 
and moorish idols. Philipp. J. Sci. 34: 403- 
478, 2 figs., 9 pis., 7 col. pis. 
Kittlitz, F. H. von. 1834. Beschreibung mehr- 
erer neuer oder wenig gekannter Arten des 
Geschlechtes Acanthurus, im stillen Ocean. 
Mus. Senckenb. 1: 189-194, 2 col. pis. 
Playfair, R. L., and A. C. Gunther. 1866. 
The Fishes of Zanzibar. J. Van Voorst, Lon- 
don. xiv + 153 pp., 15 pis., 6 col. pis. 
Randall, J. E. 195 5^. An analysis of the 
genera of surgeon fishes (family Acanthuri- 
dae). Pacif. Sci. 9(3) : 359-367. 
195 5 A Fishes of the Gilbert Islands. 
U. S. Nat. Res. Coun. Pacif. Sci. Bd. Atoll 
Res. Bull. 47: xi + 243 pp., 2 figs. 
1955 c. A revision of the surgeon fish 
genera Zebrasoma and Par acanthurus. Pacif. 
Sci. 9(4) : 396-412, 8 figs., 1 col. pi. 
