67-4 Devil's Hole, Ash Meadows, Nye County, Nevada. 30 June and 1 July 1967 Attempted Removal and Count of Entire Population of Cyprinodon diabolis. C.L. Hubbs, R.R. Milla, J.E. Deacon, [illegible] J.James, Don Johnson, Elena Arnold. Initial Observations: Weather - clear. Gentle wind. Algae quite abundant on shelf and floating algae present at edge of shelf. 30 June 1967 1:30 A.M. Dr. Deacon and I arrived at Devil's Hole and set fish traps (see map) 8 traps (1/4" wire mesh - no bait used) (4) set on upper shelf 3 sinkers (~2ft. in depth) 1 floater (water only ~1.5' deep) (3) sinkers set on lower shelf at ~21', 24', & 27' depths. (1) floater set on the side of Devil's Hole near a small outcropping (see map) near the corner of the upper shelf near trap [illegible]. Observations at that time (1:30 - 2:30 A.M.): C. diabolis very numerous on shelf. Counted fish on the large rock at the NE corner of the upper shelf, near upper shelf trap [illegible]. In different areas on the rock, we counted 20, 11, & 16 fish within an 8" diameter. All of these fish