130 THE SHORE FISHES. 
white bar on the base of the pectoral rays behind, separating the darker fin from 
the purplish 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 Herter & SNopGRAss. 
Proc. Wash. Acad. Sci., 1903, 5, p. 202, pl. 7. SnopGrass & Heuer, Proc. Wash. Acad. Sci., 1905, 6, 
p. 389. 
Two specimens 275 to 238 inches long, Chatham Island, shore. 
Proportional measurements of the two specimens. 
Head in total length without caudal 31533) 3.42 
Depth without caudal 2.30 2.28 
Eye in head 3 2.80 
Interorbital in head 3.60 3.50 
Preorbital in head LEAs 7.00 
Dorsal XII, 16 XII, 16 
Anal II, 15 II, 14 
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 distinet. 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 § to 12 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. rectifraenwm do 
not show the paler caudal peduncle and caudal. The specimens of P. arcifrons 
