G-12. Crab Creek. Sec. 28, T. 33 S, R. 7 E. June 2 and July 20. Isolated pools. Average width 18 feet, average depth one foot. Water turbid. Bottom bedrock and rubble. _Myriophyllum heterophyllum_ and _Justicia americana_ abundant. G-13. Crab Creek. Sec. 21, T. 33 S, R. 7 E. July 29. Isolated pools 300 feet by 24 feet. Average depth 12 inches. Water turbid. G-14. Unnamed creek (hereafter called Grand Summit Creek). Sec. 26, T. 31 S, R. 7 E. August 30. Intermittent pools. Average width 15 feet, average length 45 feet, average depth 11 inches. Water clear. Bottom rubble. [Illustration: PLATE 9 1. Station A-2. Arkansas River. (Cowley County, Section 22, T. 34 S, R. 3 E.) 2. Station G-2. Grouse Creek. (Cowley County, Section 23, T. 34 S, R. 5 E.)] [Illustration: PLATE 10 1. Station C-12. Cedar Creek. (Cowley County, Section 17, T. 34 S, R. 8 E.) 2. Station C-16. Spring Creek. (Elk County, Section 26, T. 31 S, R. 8 E.) Volume of flow of this small creek is indicated by riffle in foreground.] G-15. Unnamed creek (same as above). Sec. 17, T. 31 S, R. 8 E. July 27. Small upland creek bordered by bluestem pastures. Pools with average width of 10 feet, average length 30 feet, average depth 9 inches. Water slightly turbid. Bottom rubble and mud. G-16. Crab Creek. Sec. 22, T. 33 S, R. 7 E. July 25. Small isolated pools. Average width 17 feet, average length 58 feet, average depth 9 inches. Water turbid. G-17. Crab Creek. Sec. 23, T. 33 S, R. 7 E. July 25. Upland brook bordered by bluestem pastures. Unshaded intermittent pools. Average width 7 feet, average length 40 feet, average depth 9 inches. Water turbid. C-1. Big Caney River. Sec. 16, T. 33 S, R. 10 E. July 19. Intermittent pools. Average width 47 feet, average length 90 feet, average depth 13 inches. Bottom rubble and bedrock. Water clear to slightly turbid. C-2. Big Caney River. Sec. 1, T. 35 S, R. 9 E. September 5. Series of intermittent pools. Bottom rubble and large stones. C-3. Big Caney River. Sec. 29, T. 34 S, R. 9 E. June 17. Large shallow pool below ledge 3 feet high forming "Osro Falls." Bottom bedrock. C-4. Big Caney River. Sec. 32, T. 34 S, R. 9 E. June 3. Three large pools (50 feet by 300 feet) with connecting riffles. Water turbid. Bottom bedrock and rubble. C-5. Big Caney River. Sec. 11 and 12, T. 34 S, R. 8 E. May 27, May 29, June 11, June 18, June 19, and June 27. From a low-water dam, 6 feet high, downstream for 1/4 mile. Pools alternating with rubble and bedrock riffles. Collecting was done at different times of day and night, and when stream was flowing and intermittent. C-6. Big Caney River. Sec. 26, T. 33 S, R. 8 E. June 16. Intermittent pools with bedrock bottom. Water slightly turbid. Average width 16 feet, average depth 10 inches. C-7. Otter Creek. Sec. 26, T. 33 S, R. 8 E. June 16. Pools and riffles. Water clear. Algae abundant. Average width 10 feet, average depth 10 inches.