132 THE SHORE FISHES. 
anterior base of fin; in some specimens there are from one to three dusky spots 
near the base of the rays on the white area of the soft dorsal, there is a pale blue 
centre in some of these spots; pectoral pale and translucent with a small black 
spot on base of upper ray; ventral dark gray or slate; anal usually creamy 
white with a broad dusky anterior and lower margin, the posterior rays with 
dusky tips. Some specimens have dusky punctulations and numerous dusky 
spots on scales of anal, some of the spots have pale blue centres. Other speci- 
mens have larger spots posteriorly, similar to those on white area of soft dorsal; 
in some there are similar spots, varying in number and extent, on caudal ped- 
uncle and caudal; caudal fin dusky, varying in intensity. 
The head in P. flavilatus is closer to P. gilli than to P. rectifraenum, but it — 
is generally longer than in P. gilli and in the latter it is longer than in P. recti- 
fraenum. The three agree quite closely in depth, P. flavilatus averaging a 
little deeper. In the eye they overlap, but P. rectifraenum averages a larger 
eye than P. flavilatus and it in turn averages larger than P. gilli. The pre- 
orbital in P. flavilatus is close to P. gilli, but is slightly narrower; in P. recti- 
fraenum it is considerably wider. The interorbital of P. flavilatus and P. gilli 
averages about the same; in P. rectifraenum it is considerably wider. 
Except the great differences in coloration, there seem to be no characters 
by which we can distinguish P. flavilatus from the young of P. gilli. Our speci- 
mens of P. gilli, however, show a more vertical posterior margin to the pre- 
opercle, which in P. flavilatus is strongly inclined forward; P. rectifraenwm is 
quite distinct. 
Pomacentrus jenkinsi Jorpan & EVERMANN. 
Bull. U. S. Fish Comm., 1903, 22, p. 189; 1905, 28, pt. 1, p. 270, fig. 115. 
Twenty-one specimens 3 to 5 inches long from La Perouse Bay, Easter 
Island. M. C. Z. 29571 (9 specimens). 
Three specimens, Nos. 3185-7, No. 3187, M. C. Z. 29685, 5g to 6 inches 
long from Cook Bay, Easter Island. 
Thirty-six specimens lyg to 6 inches long, Easter Island, shore. M. C. Z. 
29442 (9 specimens). 
In counting the soft dorsal of the above specimens, we have counted the 
last ray divided to the base as two rays. It is evident that previous authors 
have counted as half or part of a ray what we now count as a ray. Out of 
thirty specimens counted from Easter Island, one had 16 dorsal rays, seventeen 
had 17 rays, eleven had 18 rays, and one had 19; the anal was uniformly 14; 
in the descriptions the dorsal has 16 and anal 13; specimens from Hawaii in 
