1915.] Nichols, Fishes New to Porto Rico. 145 
Monacanthus tuckeri Bean. 
A single small specimen about 14 in. long, dredged in Condado Bay, 
near the inlet, July 21, 1914. Color in life olive, paler below; large pale- 
blue reticulations on lower side anteriorly; pelvic flap with bright yellow 
margin; pectoral, dorsal and anal fins rose-colored; caudal with an inky 
black central spot, and pale bars along the upper and lower margins. 
Callionymus calliurus Eigenmann & Eigenmann. 
A single small specimen about one inch long dredged in Condado Bay 
July 21, is the first of this family to be recorded from Porto Rico. 
Gobius translucens sp. nov. 
The type and only specimen obtained, No. 4802, American Museum of Natural 
History, was taken in perhaps 12 feet of water close to the shore near the San Antonio 
Bridge, San Juan, July 15,1914. It is 27 mm. long to base of caudal; head 3.3 in this 
measure; depth 4.4; eye 3 in head; snout 4; maxillary 2.6, extending to under front 
of pupil; lower jaw slightly projecting; interorbital space very narrow, concave; 
profile low, gently arched above, rather straight below; a row of small, rather wide- 
set conical teeth in jaws; gill openings 
wide; scales rather large, ctenoid, 23 in lle 
a longitudinal series; dorsal VI-10, anal ¥ Le 
10; fins all moderate. Longest dorsal a rite Dae i OR Ha —— 
spine 1.4 in head, longest dorsal ray 2.; 1 Le A a 
pectoral about equal to head. The ie -- caedaaes \ Se 
caudal, which is broken, was evidently get on enti paeencae aor. 
somewhat pointed, probably slightly 
shorter than head; united ventrals 1.3. In spirits straw color, the sides with two 
series of diffuse vertical brownish marks, the lower of these extending straight to the 
base of the caudal, the upper reaching the back near the axil of the soft dorsal and 
forming three or four saddle-like marks on the peduncle. Nine strong dark spots 
on the mid line of the back, the first just back of the eye, the last in the axil of the 
soft dorsal, in the front of the first above mentioned ‘“‘saddle’’; a strong dark stripe 
from the eye to the shoulder, a faint narrow, more or less parallel one above it, best 
marked posteriorly. A narrow, dark streak passes from the snout below the eye and 
backward, and a streak connects a dark bar at the end of the maxillary with a dark 
triangle on the opercle; two black spots connected by a black vertical bar on the 
base of the caudal; scales of the body with a tendency to dark margins and pale 
centers. 
This fish is close to G. glaucofrenum (Gill). The color pattern alone 
would differentiate it, however, unless there is more variation than supposed 
in the small gobies allied to this form. 
