PAPERS PRESENTED AT GENERAL SESSIONS 53 



end of this beautiful island, is the outfitting station for 

 expeditions to the Valley of Ten Thousand Smokes. Ash 

 from the Katmai eruption of 1912 is still seen blowing 

 about on the mountain tops. A small pond in the town 

 has a bottom of volcanic ash ; no life was found in this 

 in the hasty examination made in the evening. But a 

 large shallow pond near the Agricultural Experiment 

 Station, supporting a rank growth of water plants, 

 yielded several mites and Crustacea. Alitak is a cannery 

 settlement at the southern end of Kodiak Island, one of 

 the many places where our boat stopped for more than a 

 day to load cases of salmon. On the mountain side, 

 brilliant with the flowers and fruits of late summer, I 

 found several shallow pools of clear water in sphagnum 

 beds, and here there was fair collecting. 



Ketchikan, the southernmost town of Alaska, was vis- 

 ited on the return trip, in the first days of September. 

 There is a mountain reservoir here, some three miles 

 along a tram-way up the slope. In a bay of this lake a 

 little material was found. 



Besides the stations enumerated, two ponds, one at 

 Seattle and one at Tacoma, were visited on the trip, and 

 interesting material found. On the way out to the coast, 

 a few days were spent in Glacier National Park ; but no 

 mites were found in any of the bodies of water tested. 

 But at Banff, on the return trip over the Canadian 

 Pacific Railway, a few mites were found in a marshy 

 pool. 



In all. nearly forty stations were visited and between 

 five and six hundred individual water mites were found. 

 Only ten genera were represented, and of these, the 

 genus Hygrobates claimed over half of the specimens. 

 Work on one genus, the Arrhenuri, has been completed, 

 and the paper is now in press. TVork on the other genera 

 will be completed as soon as time will allow. Material 

 in other groups collected at the same time has been 

 turned over to other workers for studv. 



