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Another even more s1snU'icant find vas a three-inch carp from the lover Yamp& River with a definite hump. This fish l18.S collected with several other 2 to 3 inch carp that did not have the hump. The presence of carp with the pronounced humped back was first noticed in 1961 (He.gen 1961). Squawtish, were taken in all types of waters but in very low numbers. The young" as ~ be expected, seem to prefer the quiet backwaters. One adult was taken from swift water on hook and line in Whirlpool canyon. The humpbacked sucker was not observed tmt U after the stream pollution which occurred in September. In that month" many of these rare forms were picked up all the way from Lodore to Split ~l:)untain campground. 'l'herewas no possible way. to assoeiate the fish with exact habitat since they could have floated or drifted some distance during the death struggle. MIm7. of these fish were reported floating in the Lodore area. A few hybrids between the h'!J1lIPback sucker Xyra.uchen texanUS' and the flannel mouth sucker Catostomus latip1nnis discobalus were found after the stream pollution. A tev were collected by Ml". Banks; others were included with some collections of the humpback sucker tor the 1llivers1ty of Colorado museum. Special efforts were made to locate specimens of the reported hump- backed torm of the Bluehead Mountain sucker Pantosteus delphinus but all were without reward. :rt was not taken in the autumn collections either. In fact" no IOOtmta1n sucker was represented in any collections in the Green River. It \1a.S fOlmd in the yampa River.. however. Aquatic plants This area of the inventory was thoroughly and adequately handled by aq\l&1:ic botanists from Utah and Utah state Universities. Comments of 1mportance would include the very pronounced increase in periphy"ton or a.lgaes immediately af'ter the water started to clear. Areas which appeared entirely devoid of any plant life in July or early August accumulated a thick green covering by late September. It wUl be noted in the Banks I 108 tor September, that rains washed cons iderable amotmts at f1la.mentous algae downstream at that time causing clogging and fouling ot throw lines. Plankton samples revealed few diatoms, blue green alge.es and green e.lgaes for most of the summer. In September the numbers of these itea increased cons iderably. ~ aquatic invertebrates. Again this area of investigation "as competently handled by utah scientists. !ol\ny collections of aquatic insects were made, however.. and notes concerning their distribution and abundance were kept. Because these organisms are so cyclic in their abundance, these notes in the log may be or some future value. Collections at Colorado State lhiversity are not ~letely worked over at this time, but the project wUl be completed. Scores f:JC- stomach samples of fish were collected and the insects they contain should provide additional valuable data. ~ =5= --...~_.