THE FISHES OF PORTO RICO. 
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head. Fins moderate; origin of spinous dorsal slightly behind base of pectoral, its spines 7 in number, 
not filamentous; interspace between dorsals less than diameter of eye; soft rays of dorsal and anal 
reaching, when depressed, beyond base of caudal; caudal long and pointed, as in Gobius oceanicus; 
pectoral pointed, reaching beyond origin of anal; ventral disk moderate, free from belly, longest rays 
barely reaching origin of anal. Scales very large, weakly ctenoid; nape, cheeks, and breast scaled, 
scales somewhat smaller than on body, about 9 scales before dorsal. 
Color, pale-olivaceous or straw-color, back and upper part of head with profuse fine dark punc- 
tulations; under parts pale, breast somewhat dusky; dorsal fins barred with white and dark, a large jet- 
black ocellus on posterior part of spinous dorsal ; other fins pale, ventral disk somewhat dusky in front. 
Known only from the type and four cotypes dredged by the Fish Hawk at station 6074, off Puerto 
Real, in 8-5 fathoms, January 25, 1899. It reaches a length of 2.75 inches. Type No. 49366, U. S. N. M. 
Named from Ensenada del Boqueron, in which the type was obtained. 
Bollmannia boqueronensis Evermann & Marsh, Rept. U. S. F. C. 1899 (Dec. 19), 356, Ensenada del Boqueron, Porto Rico. 
Genus 141. MICROGOBITJS Poey. 
Dorsal spines 7 or 8; scales very small, cycloid or weakly ctenoid, body scaled anteriorly as well 
as posteriorly, head naked, nape, belly and breast usually so. Inner edge of shoulder-girdle without 
fleshy processes; body more or less compressed; mouth large, very oblique; lower jaw conspicuous, 
teeth strong; interorbital groove with or without a median ridge. Vertebrae 11 + 15 or 16. 
a. Scales about 42. Body elongate, moderately compressed, depth 4 to 5 in length; head long and large, rather sharp 
in profile, 3 to 3. 5 in body; eye longer than snout, 4 in head; mouth large, very oblique, lower jaw strongly 
projecting; maxillary 1. 5 to 2. 5 in llead, extending to opposite middle of eye, or much beyond front of orbit; 
teeth in few series, the outer very long and slender, curved, the lower longest, none canine-like; scales small, 
some of them with short, thick teeth, those of anterior part of body not well developed; dorsal spines more or 
less filamentous, third and fourth or fourth and fifth sometimes with long filaments; caudal pointed, about as 
long as head. Grayish-olive, with rather sharply defined markings of darker brown overlaid with orange in 
life; head with a pale-bluish or gilt stripe from maxillary backward across suborbital region to upper edge of 
gill-opening; another pale gilt streak from snout along lower part of eye, another from angle of mouth upward 
and backward; rest of head dark; opercle with an oblique, blackish bar; top of head and nape with dark 
marbling surrounded by paler reticulations; back with a series of black cross-blotches mostly separated on 
median line; 2 narrower dark vertical bars behind pectoral; middle line of side posteriorly with longitudinally 
oblong black blotches; besides these, numerous other blotches not regularly arranged; first dorsal with 2 or 3 
oblique black bands; second dorsal pale, with about 4 series of black dots; caudal spotted with black; pectoral 
yellowish; ventral black, its center yellowish (male); anal pale. D.vii-15; A. 16 or 17 gulosus 
aa. Scales 50 to 55. 
b. Scales 50,-14, cycloid; D.vii-15; body scarcely compressed eulepis 
bb. Scales 55,-12, strongly ctenoid; D.vii-17; body greatly compressed meeki, 253 
aaa. Scales 65 or more. 
c. Caudal fin more than one-third (two-fifths) length of body. Scales very small, cycloid, deciduous. Body elongate, 
much compressed, highest in front of ventrals, tapering regularly to very narrow, short caudal peduncle; 
greatest depth 4.75 in length; head 3.5. Head compressed, much higher than wide; snout very short, acute, 
preorbital not as wide as pupil; mouth terminal, very wide and oblique; jaws equal; maxillary reaching vertical 
from middle of orbit, 2 in head. Outer series of teeth enlarged. Eye 3 in head. Dorsals closely contiguous; 
spines very slender, fifth slightly produced and filamentous; pectoral as long as head. Head and body 
translucent, overlaid by brilliant green luster, formed by minute, close-set green points; 3 conspicuous 
translucent bars wider than interspaces, crossing body close behind head; head with 2 brilliant narrow blue 
and green lines running obliquely across cheek below eye; dorsal whitish, with 2 or 3 lengthwise series of 
large reddish-brown spots; spinous dorsal blackish at base, upper caudal rays marked with red, lower portion 
of caudal and most of anal fin blackish, anal whitish at base, anterior rays tipped with white. In spirits, 
body dusted with dark points; 2 light crossbars toward head; lower part of caudal and anal black. D. vii-16; 
A. 15 tha/assinus 
cc. Caudal fin less than one-third length of body. Scales small, cycloid, embedded. Body very much compressed, 
more or less elongate, greatest depth at ventrals 4 (female) to 6.5 (male) in length; head 3.5 to 4. Head much 
compressed, much deeper than wide. Snout very short, acute, anterior profile not decurved, not steep; 
preorbital not as wide as pupil; mouth very large, very oblique or almost vertical: maxillary extending to 
below pupil, 2 in head (in male), 2.25 (in female). Lower jaw projecting, teeth of outer series enlarged, 
recurved. Eye 3.25 to 4 in head. Dorsals contiguous, spines very fine, produced in filaments, third highest, a 
little longer than head; second dorsal and* anal high. Head and nape naked. In the female the depth is 
greater, mouth less oblique, smaller; profile from spinous dorsal oblique. First dorsal spine highest, 3.33 in 
length. Ventrals much shorter than in males. Dark gray; female with a short bright-blue bar bordered by blackish 
above pectoral; a blotch of sky-blue and orange below eye; fins dusky, ventrals pale in female, dusky in 
males. Males with body plain bluish-gray. D. vil-17 to 20; A. 18 to 21; scales 68 to 70 signatus 
