THE FISHES OF EASTER ISLAND 61 
Acanthistius fuscus Regan, related to A. cénctus Giinth., Norfolle L. 
Girellops nebulosa Kend. & Radcl., related to TZephreops richardsonii 
Giinth., coasts of N. S. Wales to W. Australia. 
Labrichthys fuentest Regan, related to L. duculenta Richards., S. and W. 
coasts of Australia, Norfolk I. 
Labrichthys semifasciatus Rendahl, relations? 
Gymnothorax obscurirosiris Rendahl, related to G. thyrsotdea Rich. Samoa, 
Tonga, etc. to Ea. Indies. 
Pseudomonacanthus paschalis Regan, related to P. ayraudi Quoy & Gaim. 
Australia. 
Ostracton pasche Rendahl, related to O. diaphanus Bl. Schn., Indo- 
Pacific. 
The total number of species listed here is 29. Eleven of these are widely 
distributed Indo-Pacific forms, and two (Ostracion pasche and Gymnothorax 
obscurirostris) are very nearly related to Indo-Pacific species. Thus an impor- 
tant part of the fish fauna or about 37 % is Indo-Pacific—taken in a wide sense— 
in character. Another group is of Polynesian distribution, or found in Poly- 
nesia and at Hawaii. This group includes about 17 % of the Easter Island 
fishes. Three species are known only from Easter Island and Hawaii. Many 
parts of the Pacific are not so well explored as Hawaii, and it is quite possible 
that the species in question have a wider distribution. I think that the record 
of one species only from Easter Island and Norfolk Island may be explained 
in the same way. 
If we examine the relations of the species possibly restricted to Easter 
Island, we find that two are related to Indo-Pacific forms, one to a Polynesian, 
three to Australian species and two to species only known from Norfolk Island. 
For one species I do not venture to presume any relationship of genetic im- 
portance. 
Considering our incomplete knowledge of the distribution of the South 
Sea fishes, I do not think that we are entitled to draw any zoogeographical 
conclusions from the fact that some species outside the coasts of Easter Island 
have been found only at Norfolk Island or at Hawaii, or are represented by 
allied species there. This point of view is strengthened by the fact that the 
fishes in question either belong to families with species of usually wide distri- 
bution (Serranide, Teuthidz, Gobiidz and Balistida), or have such a systematic 
position that their »nearest relative» belongs to another genus (Gzrellops- 
Lephreops); in one case (Labrichiys fuentes?) the degree of genetic affinity is 
questionable. 
According to my opinion the fish fauna of Easter Island shows the 
closest resemblance to that of Polynesia, but it contains several species of 
apparently endemic character. 
‘ A second species of the genus Gzre//ops — G. fimbriatus — has recently been described 
by A. R. McCuttocu from a single specimen, which was collected at the Kermadec Islands 
(Rec. Austr. Mus., XIII, 1920, p. 66). 

