FISHES COLLECTED IN THE TORTUGAS ARCHIPELAGO. 
541 
Family CILETODONTIDX 
Ch.8etod.on capistratus Linnaeus. 
One very small specimen, an inch long, typical of Chxtodon bricei. It is highly probable that 
this is the young of Chxtodon capistratus, from which it differs solely in the presence of a second 
smaller ocellus above the large one on the side. The large ocellus is, however, vertically oblong in 
Chxtodon bricei and round in Chxtodon capistratus. The two species may be identical. 
Pomacanthus arcuatus (Linnaeus). One small specimen. 
Family GOBI I DTE. 
Gobius soporator (Cuvier & Valenciennes). 
Numerous examples of this very common species, very pale, as usual in coral-reef examples. 
Ctenogobius glaucofraenum (Gill). 
Three specimens, the longest about 1.5 inches long. 
This species is known at once by the two black spots in a vertical line at base of caudal. Color 
very pale olive; fins translucent; sides with 3 rows of vertical olivaceous spots; a blackish streak back- 
ward from eye to shoulder; a dusky patch on preopercle; a slight dusky shade from eye to angle of 
mouth; two small black spots at base of caudal. 
This little species was described as from the coast of Washington-. This is an error, as Dr. 
Eigenmann has shown. It is not found in the Pacific, while it does occur at the Dry Tortugas, 
from which region Eigenmann had four examples. 
Ctenogobius tortugas Jordan, new species. Plate 1, fig. 1. 
Head 3.4 in length; depth 4.66; D. vi — 10 or 11; A. i, 10; scales 22 or 23, 9; eye 3.66 in head, a 
little shorter than snout; maxillary 2.75; pectoral equal to head, caudal a little shorter; united ventrals 
about four-fifths head; body elliptical-fusiform, a little slenderer and a little more compressed than in 
Gnatholepis thompsoni. Head lower and more pointed, the interorbital space scarcely more than one- 
third the rather large eye; mouth moderately oblique, the maxillary reaching front of pupil, lower 
jaw very slightly projecting, upper jaw protractile; teeth small, subequal, as usual in this group; 
snout about as long as eye; gill-openings very slightly continued forward below; cheeks and opercles 
naked; nape partly naked, with a low median ridge of skin; body covered with large thin scales, 
which are but slightly ctenoid; dorsals rather low, the species slender, the anterior longest; caudal 
subtruncate, the lower rays apparently rather longest; pectorals moderate; ventrals long, reaching vent. 
Color very pale yellowish, almost white; a row of small blackish spots along base of dorsal, those 
behind smaller and reduced to dots; a row of small spots along side; a small spot or group of dots on 
humeral region; a row of small specks behind it in a line; a distinct short blackish bar at base of 
middle rays of caudal; a jet-black spot as large as pupil behind eye, above opercle; a faint dark bar 
below eye; a fainter one behind preopercle; a faint bluish streak behind eye; fins all plain whitish, 
the ventral faintly dusky; some scales with traces of a faint whitish spot. 
A single fine specimen 2.2 inches long (type, No. 8363, L. S. Jr. Univ. Mus. ) was sent by Dr. J. C. 
Thompson from Garden Key, one of the coral islands known as the Dry Tortugas. 
Gnatholepis thompsoni Jordan, new species. Plate 1, fig. 2. 
Head 3.75 in length; -depth 4.25; D. vi-i, 11; A. i, 10; scales 28, -9; eye 3.5 in head, equal to 
snout; maxillary 2.75; pectoral equal to head; caudal equal to head; ventrals a little shorter. Body 
fusiform, shaped as in the percoid genus Boleosoma; head gibbous above eye, the snout short and 
decurved; interorbital space half width of the small eye; mouth low, small, horizontal, the lower jaw 
included; upper jaw protractile; teeth moderate, curved, subequal, apparently in a single row; 
preorbital broad; maxillary scarcely reaching past front of eye; cheeks and opercles each with about 
4 rows of large scales; nape with smaller scales; body covered with large scales; gill-openings rather 
broad, extending forward anteriorly; spinous dorsal low, its outline rounded, the spines slender; 
anal moderate, caudal sublanceolate, the middle rays slightly produced; pectorals moderate; none of 
the rays silky; ventrals large, the membrane across the base well developed. 
Color pale straw-yellowish, with some mottlings of darker olive, these forming a row of faint 
shades along back, and 6 faint quadrate spots, largest and darkest anteriorly, on lower part of side; a 
black blotch above axil; a narrow, sharply defined black bar, like a pen-mark, below eye, a faint 
