THE FISHES OF PORTO RICO. 
291 
The range of this species is from Florida to Rio Janeiro; it is recorded from Pensacola, Rio 
Almendares (Cuba), Santo Domingo, Martinique, Surinam, and Rio Janeiro, and was found by us to 
be common in fresh and brackish waters of Porto Rico. In the Bayamon River 13 specimens were 
obtained January 12, varying in length from 3.5 to 6.25 inches. There is a single specimen, 1.5 inches 
long, from Mayaguez, January 20, and 3 small ones, from 1.31 to 2.06 inches long, from Arroyo. This 
species is known in Porto Rico only as “moron.” It does not seem to be much used as food. It is 
apparently most common in the lower portions of rivers, and probably does not run to the headwaters. 
Amore pixuma, Marcgrave & Piso, Hist. Brasil., IV, 166, 1648, Brazil. 
Eleotris capite plagioplateo, Gronow, Mus. Ichth., II, 168, 1757; after Marcgrave & Piso. 
Gobius pisonis Gmelin, Syst. Nat., 1206, 1788; based on Eleotris of Gronow. 
Eleotris gyrinus Cuvier & Valenciennes, Hist. Nat. Poiss., XII, 220, pi. 356, 1837, Martinique, Santo Domingo and Surinam; 
Poey, Fauna Puerto-Biquena, 339, 1881; Stahl, 1. c., 79 and 165, 1883. 
Eleotris ( Culius) belizianus, Sauvage, Bull. Soc. Philom. Paris 1879, 55, Belize and Cayenne. 
Eleotris pisonis, Jordan & Evermann, 1. c., 2200, 1898. 
Fig. 88 . — Eleotris pisonis. 
Genus 137. SICYDIUM Cuvier & Valenciennes. 
Body subcylindrical, covered with rather small ctenoid scales; head oblong and broad, with cleft 
of mouth nearly horizontal; upper jaw prominent; snout obtusely rounded; lips very thick, lower jaw 
with a series of numerous slender horizontal teeth, of which sometimes only the extremities are 
visible; upper jaw with a single uniform series of numerous movable small teeth attached by ligament 
to edge of maxillary; behind this outer visible series lie numerous other parallel series of young teeth 
hidden in the gum, which succeed the former as they become worn out or broken; lower jaw with a 
series of widely-set conical teeth; teeth all simple, slender, distal half bent inward nearly at a right 
angle; eyes of moderate size; 2 dorsal fins, anterior with 6 (5 or 7) flexible spines; caudal quite free; 
ventrals united into a short cup-shaped disk; gill-openings of moderate width; 4 branchiostegals. 
Found in the streams of the West Indies. Few species. 
a. Body usually well scaled. 
b. Scales large, about 56 In longitudinal series picnctatum 
bb. Scales moderate, about 68 cmtillarum 
bbb. Scales small, about 84. 
c. Body densely scaled; no dark vertical bars on body caguitse , 245 
cc. Body less densely scaled; squamation sometimes quite incomplete; about 7 more or less distinct vertical bars on 
body - plumieri, 246 
aa. Body nearly naked vincente 
245. Sicydium cagmitas Evermann & Marsh. 
Head 4.4; depth 4.8; eye 5.75; snout 2.5; maxillary 2; mandible 2.75; interorbital width 3; 
preorbital 3.5; D. vi-i, 10; A. i, 9; scales 83,-25; longest dorsal spine 1.5 in head, longest ray 2; 
longest anal spine 2 in head, longest ray 2; pectoral 1.1; ventral disc 1.75; caudal 1. Body rather 
stout, heavy forward; head large, broad; mouth large, its width 1.5 in head; lips very thick; maxillary 
not greatly produced; teeth simple, flexible; a median cleft in upper lip; pectoral somewhat shorter 
than head; dorsal spines without filaments, longest about 1.5 in depth of body; space between dorsals 
about equal to orbit; soft rays of dorsal and anal scarcely reaching base of caudal; ventrals united. 
