380 DR. GUNTHER ON THE FISHES OF CENTRAL AMERICA. 
to 40 feet. It is situated in lat. 15° 30'N., long. 89° 15' W., at the bottom of the Bay of 
Honduras. One large river, the Polochic, enters this lake ; and it has a narrow but deep 
outlet to the sea, called the Rio Dulce, which is navigated by small schooners plying 
between Belize and the town of Yzabal. It was near this last-mentioned place that a 
few species of fish were obtained. 
Rivers. 
Bayano.—This is a river which rises in the narrow part of Central America, and flows 
into the Pacific a little to the southward of the Bay of Panama. 
Canason.—The town of Cahabon, where a few fishes were obtained, is situated on an 
affluent of the river which bears this name. The main stream rises in the same marsh 
as the Polochic, but takes another valley, in Vera Paz, and again joins the Polochic, 
when they both flow into the Lake of Yzabal, and thence into the Atlantic. 
CuaGres.—This is the principal river of the Isthmus of Panama. It flows into the 
Atlantic. The fish were obtained near the railway bridge at Barbacoas, about halfway 
across the isthmus. 
Cuisoy.—Of the numerous names this river bears, I have chosen this for the principal 
stream which forms the large river that flows out into the Laguna de los Terminos, in 
the Bay of Campeachy. ‘This branch is also known as the Rio Negro; and after 
receiving the water of the Rio de la Pasion, or Rio de Santa Isabel, as it is also called, 
the two are usually called the Usumacinta. Fishes were collected from this river near the 
Indian village of Cubulco; and a number were also procured by poisoning with herbs a 
small stream near Saouchil, an Indian village below the town of Coban, in Vera Paz. 
GuacaLATE.—Is one of the numerous rivers which drain the southern watershed of the 
main ridge into the Pacific. It flows past Antigua, the old capital of Guatemala. Fishes 
were obtained about 3500 feet above the sea, where the river is still quite a torrent. 
Moracua.—This river, the second largest in Guatemala, rises in the main ridge, and 
flows, with high mountains on either side, nearly due eastward into the Atlantic. Fishes 
abound in this river; and nearly every year a considerable length is poisoned, and a 
large quantity obtained. On one of these occasions a collection was made a little below 
the bridge over which the highroad from Guatemala to Vera Paz passes. Another 
collection came from lower down the stream, below the village of Tocoy. 
San Geronimo.—Is a tributary of the Chisoy before mentioned. A small collection 
was made near the village of San Geronimo, in a plain at the foot of the mountains 
whence it takes its rise. 
Santa IsaBEL.—A small stream flowing into this river, one of the principal branches of 
the Usumacinta, was poisoned, and a number of small fishes obtained. 
San Satvapor.—A few small fishes were caught by Capt. Dow in a warm stream near 
the capital town of this republic. 
