FISHES FOUND IN YHE VICINITY OF WOODS HOLE. 
103 
of this band, extends from front of dorsal to posterior angle of opercle, thence obliquely downward 
and backward behind base of pectoral. Behind this band and separated from it by a space somewhat 
wider than eye is another dark band; it is duller and two-thirds wider than the foregoing, with its 
anterior edge curved forward and its posterior margin on the caudal peduncle. Involving about two- 
thirds the width of this band aud extending from the dorsal to the ventral edge of the body is a large, 
circular ocellus, more than 1£ times the size of eye, consisting of a dark -blue spot surrounded by a 
narrow white zone, which covers a part of the base of the soft dorsal. Immediately above this and 
within the extension on the dorsal fin of the dark band is another similar but smaller ocellus, about 
the size of eye, involving the first 8 or 9 rays of the soft dorsal. A narrow, dark-brown, vertical bar 
on caudal peduncle is separated from the base of the caudal rays and from that part of the broad body 
band posterior to the ocellus by narrow white spaces. Head in front of ocular stripes, and breast 
greenish yellow. A black crescentic mark on opercle. Spinous dorsal dusky, the dark vertical band 
extending on the first 7 spines. Soft dorsal dark, with sharply defined pale edge. Part of anal 
covered by scales dusky, with a narrow darker margin; unsealed portion yellowish white. Caudal 
and pectorals pale, ventrals dusky, edged with yellow. 
The foregoing description applies especially to the largest specimen, taken October 7 ; the others 
differ from it only in having darker dorsal, anal, and ventral fins, and minor variations in the dorsal 
and anal rays. 
153. Chaetodon striatus Linnfeus. Portuguese Butterfly. (§) 
Taken on only one occasion.- On October 29, 1894, a specimen 1| inches long was caught in a 
seine in Great Harbor. 
BALISTIDiE. The Trigger-Fishes. 
154. Balistes vetula Linmeus. Trig ger- fisli ; Leather-jacket. (* t §) 
Every season, mostly in September, adult specimens of this fish are taken in some numbers in the 
traps at Menemsha. During summer and fall the young, 11 or 2 inches long, are found at the surface 
in Vineyard Sound in gulf-weed and also around the shores. 
