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. flavilatua is closer to P. gilli than to P. redifraenum , but it 

 is generally longer than in P. gilli and in the latter it is longer than in P. redi- 

 fraenum. The three agree quite closely in depth, P. flavilalus averaging a 

 little deeper. In the eye they overlap, but P. redifraenum 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. redi- 

 fraenum it is considerably wider. The interorbital of P. flavilatus and P. gilli 

 averages about the same; in P. redifraenum 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. redifraenum is 

 quite distinct. 



Pomacentrus jenkinsi Jordan & Evermann. 



Bull. U. S. Fish Coram., 1903, 22, p. 189; 1905, 23, pt. 1, p. 270, fig. 11.5. 



Twenty-one specimens g 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, 5j to 6 inches 

 long from Cook Bay, Easter Island. 



Thirty-six specimens Ijs 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 



