C-8. Big Caney River. Sec. 1, T. 33 S, R. 8 E. June 10. Intermittent pools. Average width 10 feet, average depth 14 inches. Water clear. Bottom rubble and gravel. Aquatic plants included _Chara_ sp., _Sagittaria latifolia_ Willd., _Jussiaea diffusa_ Forsk., and _Nelumbo lutea_ (Willd.). C-9. Big Caney River. Sec. 6 and 7, T. 32 S, R. 9 E. June 27. Clear, flowing stream, 20 feet wide, volume estimated at 5 cfs. Bottom gravel and rubble. Extensive gravel riffles. C-10. Big Caney River. Sec. 29 and 32, T. 31 S, R. 9 E. June 27. Water clear and flowing rapidly, volume estimated at 5-6 cfs. Bottom rubble with a few muddy backwater areas. C-11. Big Caney River. Sec. 7, T. 31 S, R. 9 E. July 26. Flowing, with less than 1 cfs. Average width 20 feet, average depth 22 inches. Water extremely clear. Bottom gravel and rubble. _Myriophyllum heterophyllum_, _Potamogeton foliosus_, and _Justicia americana_ common. C-12. Cedar Creek. Sec. 17, T. 34 S, R. 8 E. March 10, April 2, June 1, June 6, and August 24. Pools and riffles along 1/4 mile of stream were seined in the early collections. In August only small isolated pools remained. Bottom bedrock and rubble. Much detritus along streambanks. (Plate 10, fig. 1.) C-13. Otter Creek. Sec. 16, T. 33 S, R. 8 E. June 15. Flowing, less than 1 cfs. Pools interspersed with rubble riffles. Water clear. C-14. Otter Creek. Sec. 30, T. 32 S, R. 8 E. May 31, and September 3. Series of small pools. Average width 10 feet, average depth 15 inches. Shallow rubble riffles. Water extremely clear. Temperature 68 deg. at 6:30 p.m. on May 31; 78 deg. at 2:00 p.m. on September 3. C-15. Spring Creek. Sec. 35, T. 31 S, R. 8 E. June 28. Small, clear, upland brook with rubble bottom. Pools 10 feet in average width and 11 inches in average depth. Numerous shallow rubble riffles. C-16. Spring Creek. Sec. 26, T. 31 S, R. 8 E. July 9. Small intermittent pools. Average width 10 feet; average depth 8 inches. Bottom gravel. (Plate 10, fig. 2.) C-17. West Fork Big Caney River. Sec. 36, T. 30 S, R. 8 E. July 27. Small pool below low-water dam. Pool 20 feet by 30 feet with average depth of 20 inches. C-18. East Fork Big Caney River. Sec. 31, T. 30 S, R. 9 E. July 27. Isolated pool 25 feet by 25 feet with an average depth of 15 inches. M-1. Middle Caney Creek. Sec. 23, T. 33 S, R. 10 E. July 4. Intermittent pools. Average width 45 feet, average depth 15 inches. Water stained brown. Oil fields nearby but no sludge or surface film of oil noted. Bottom rubble and bedrock. M-2. Pool Creek. Sec. 25, T. 33 S, R. 10 E. May 26. Pool 120 feet by 40 feet below limestone ledge approximately 12 feet high forming Butcher's Falls. Other smaller pools sampled. Water clear. Bottom bedrock and rubble. E-1. Elk River. Sec. 12, T. 31 S, R. 11 E. July 9. Four intermittent pools seined. Average width 32 feet, average depth 13 inches. Bottom bedrock, rubble, and mud. Water turbid.