THE CATFISHES OF VENEZUEI,A — SCHULTZ 177 



March 2-3, Rfo Negro, a tributary of the Rfo Santa Ana, below the mouth of 

 the Rfo Yasa, 75 km. by road south of Rosario. This river, 35 to 50 feet wide, 

 with deep muddy holes and gravelly riffles, had cut itself a steep, clay-banked 

 channel 10 feet or more below the general level of the ground. 



March 5, Lago Maracaibo at Maracaibo Yacht Club. 



March 6, Rio Palmar at the bridge about 70 km. southwest of Maracaibo. This 

 stream, 75 to 100 feet wide, has a gravelly to sandy bottom, current rapid. No 

 deep pools. 



March 6, Lago Maracaibo, 7 km. south of Maracaibo. Sandy beach. 



March 8, a small pond, tributary to the Rfo G6, Rfo Palmar system, 2 km, 

 west of Rosario. 



March 10, Campo de Lago Petroleum Corporation, Maracaibo. 



March 11, Los Monitos, 45 km. north of Maracaibo, a tidal cano connected 

 with the lower Rfo Lim6n. 



March 11, cano % km. west of Sinamaica, about 60 km. north of Maracaibo. 

 This is a tidal cano connected with the lower Rfo Lim6n. 



March 11, Cienaga del Guanavana, about 10 km. north of Sinamaica. This 

 swamp was muddy and shallow, about 3 feet deep in places during the dry season. 

 The bottom was made up of shell and vegetable debris. 



March 12, Caflo de Sagua, about 35 km. north of Sinamaica. Salinity 1.021. 



March 12, channel of Salina Rica, 5 km. north of Maracaibo. 



March 15, Lago Maracaibo, 2 km. off Lagunillas, water depth 15 feet, bottom 

 muddy. Specific gravity 1.004. 



March 16, Rfo Machango at bridge about 35 km. south of Lagunillas. This 

 stream has a muddy bottom. It was about 20 feet wide, with high clay banks. 



March 17, Rfo Motatdn at the bridge 22 km. by road north of Motatdn. This 

 river is very swift, with rubbly to gravelly bottom and 200 feet or more wide. 



March 17, Rfo San Juan (tributary of Rfo Motatdn), at bridge about 20 km. 

 south of Mene Grande. This river, with deep pools and riffles, was 100 to 150 

 feet wide; riffles mostly rubble and the pools with muddy bottoms. 



March 19, a roadside pond, tributary to the Rfo Cocuiza during the rainy 

 season, is about 50 km. by road east of Altagracia and 10 km. west of El Mene. 

 Bottom mud. 



March 20, Rfo San Juan at bridge, same as March 17. This stream was nearly 

 dry, except for the deep pools. 



March 20, Rfo San Pedro (tributary of Rfo Motat^n), at bridge about 18 km. 

 south of Mene Grande. This stream, with riffles and pools, was nearly dry except 

 for the pools. Its width was about 50 feet. 



March 21, Rfo Machango, about 20 km. above bridge south of Lagunillas. 

 The river here was 75 to 100 feet wide, but now almost dry except for deep pools 

 and a trickle of water over the stony riffles. 



March 21, a hot spring, temperature 109° F., tributary to Rfo Machango, 

 20 km. above the bridge south of Lagunillas. Fish were taken in water 100° F. 

 and at lower temperatures. 



March 24, Rfo Motatdn, about 8 km. below Motatdn. This river was 80 to 

 125 feet wide and flowing rapidly, torrential in places. Bottom rubble to gravel. 

 Depth to 4 feet, no pools. 



March 24, Rfo Jimelles, 12 km. east of Motatd.n, tiibutary to Rfo Motatdn. 

 Width of river 50 to 100 feet, depth to 2 or 3 feet, current rapid to torrential. 



March 25, Rfo Motatdn, 4 km. above Motatdn. Width 75 to 150 feet; depth 

 to 4 feet; current torrential. 



