208 
BULLETIN OF THE UNITED STATES FISII COMMISSION. 
TRIP OF 1890. 
Leaving tlie University of Illinois July 11, I was joined in Chicago by Prof. 
Linton July 14, having spent the interval in supplying deficiencies in our outfit. We 
left Chicago on the evening of the 14th, reached Mammoth Hot Springs, in Yellow- 
stone National Park, via the Northern Pacific Railroad from St. Paul, during the 
afternoon of July 17, and went into camp the same evening on Swan Lake Plateau, 
with everything ready for the field. Our party at starting consisted of Prof. 
Linton and myself, our guide, Mr. El wood Hofer, who had made our camp ready in 
advance, and a teamster, two packers, and a cook. Our outfit contained (besides the 
necessary camp equipage) pack animals and saddle horses for six men, a portable can- 
vas boat with two pairs of oars, two naturalist’s dredges with rope, a set of portable 
sieves for assorting the contents of the dredges, a sounding line, a very deep trammel 
net 50 yards long, a creek seine, an ordinary minnow seine, a Baird collecting seine, 
surface nets, hand nets, two deep-sea thermometers, a dissecting microscope, a com- 
pound microscope with complete equipment for field microscopy and for the preserva- 
tion of perishable minute material, tanks of alcohol, bottles, vials, etc. 
Breaking camp on the morning of July 18, we rode 25 miles through Norris Geyser 
Basin and down the Gibbon River to the branch of the latter known as Canyon Creek, 
where we camped for the night and made our first collections with hand nets from that 
stream. On the 19th we rode through the lower and upper geyser basins and camped 
just beyond the latter, on the banks of the Firehole River. 
Collections with hand and surface nets were made here from various points on the 
Firehole and from the outlet of a warm spring on its banks. As we were now to travel 
for some weeks by mountain trails, the teamster was here turned back, and the pack 
animals were loaded for the trip across the u continental divide.” Leaving this camp 
on July 20, we crossed the divide through Norris Pass and went into camp on the 
shore of the north end of Shoshone Lake, at the mouth of Heron Creek. A hurried 
dip with surface nets was made, in passing, into the waters of some large ponds, with- 
out outlet, in the mountains near the summit of the divide. 
On Shoshone Lake we stayed for the three days following (two of the party 
circumnavigating it on the 22d), and made extensive collections along shore, in the 
inlet of the lake, in an overflow lagoon or pond beside it, and from its own waters with 
towing net and dredge, from the surface by day and night, and from the bottom at 
depths varying from 8 to 40 feet. Breaking camp on this lovely lake, which will ever 
have a peculiar charm in our memories as the place where systematic work on the 
invertebrate life of the waters of the Park began, we went on the morning of the 24tli 
to Lewis Lake, 12 miles below, two of the party running the rapids of Lewis River in 
the boat. We camped on the east shore of Lewis Lake, working July 24 aud 25 with 
dredge and small nets in the lake, and making miscellaneous collections from streams 
of various temperatures and from the waters of a swamp which becomes connected 
with the lake in spring. 
From Lewis Lake we rode to Heart Lake, a distance of 7 or 8 miles along the 
foot of the Red Mountains. Arriving at noon of the 26th, we crossed Witch Creek 
and camped in a grove of pines above its mouth, not far from the foot of Mount Sheri- 
lan, whose precipitous front was a maze of roaring streams supplied by the melting 
