130 



THE SHORE FISHES. 



white bar on the base of the pectoral rays behind, separating the darker fin from 

 the purphsh brown pectoral base. In practically all our specimens of P. recti- 

 fraenum there is a small black spot on the outer base of the first pectoral ray 

 which does not extend on to base of pectoral. On P. gilli there is no distinct 

 black spot but a very dusky area extends across the outer base of the pectoral fin. 



Pomacentrus arcifrons Heller & Snodgrass. 



Proc. Wash. Acad. Sci., 1903, 5, p. 202, pi. 7. Snodgrass & Heller, Proc. Wash. Acad. Sci., 1905, 6, 

 p. 389. 



Two specimens 2^ to 2u inches long, Chatham Island, shore. 

 Proportional measurements of the two specimens. 



Color in spirits, very dark brown, a little lighter on belly and lower part of 

 head; lips pale; body posteriorly gradually becoming lighter to margin of caudal, 

 which is quite pale; posterior margin of soft dorsal slightly paler than rest of fin; 

 traces of small pearly spots on head ; no trace of black spot or ocellus on anterior 

 base of soft dorsal ; small white spot on base of two last dorsal rays, a larger one 

 on base of posterior anal rays; small black spot on base of first pectoral ray and 

 a pale bar on pectoral behind axil as in P. rectifraenum but not so distinct. The 

 smaller specimen is similarly colored, the pale areas being, however, more marked; 

 an indistinct ocellus is formed on the anterior base of soft dorsal by a circle of 

 small pale spots, the ground color of the ocellus of same intensity as surrounding 

 area. 



Thirteen specimens I to Ij inches long, Chatham Island. M. C. Z. 29456 

 (2 specimens), M. C. Z. 29606 (1 specimen). 



The general color of these is same as preceding, but the posterior pale area 

 is almost yellowish white and covers posterior half of soft dorsal. The black 

 ocellus on anterior base of soft dorsal is very distinct. 



The large specimens compared in color with specimens of P. rectifraenum 

 of same size, show no marked difference. Our specimens of P. rectifraenum do 

 not show the paler caudal peduncle and caudal. The specimens of P. arcifrons 



