178 NATURAL SCIENCE. September. 



Grande, and returned in the middle of January to Punta Arenas on 

 board the " Condor." During trips to Useless Bay and Dawson Island 

 and to Rio Seco, the dredge yielded a number of interesting forms, 

 but the most valuable collections were obtained on a voyage of three 

 weeks' duration to the southern archipelago. On this trip, which 

 started on February i and was favoured by fine weather, I 

 was able, through the kindness of Captain A. Fontaine, to make 

 excursions ashore whenever I liked, and to dredge at some twenty 

 different places in Beagle Channel and round the Islands of Navarino, 

 Lennox, and Picton. I dredged as far west as Stewart Island, lat. 

 54° 5' S., long 71° 29' W., and south at Lagotowia in Tekenika Bay, 

 some 30 miles north of Cape Horn. It is to be regretted that I did not 

 reach a depth of 100 fathoms or more, but the currents were too strong 

 (in the First Narrows of the Strait the tide sets at seven to ten knots an 

 hour) to allow my small light trawls, even with supplementary weights, 

 to reach the bottom. By dredging on the sea and collecting on land, 

 I think I gathered a fairly representative collection of marine and 

 terrestrial fauna. Spiders are singularly abundant, both in number of 

 species and of individuals. Some species of phalangiids of strange 

 appearance and remarkable size were found at Lagotowia and a few 

 other stations. I may mention here the occurrence at Ushuwaia and 

 at Gable Island of a Limaciid, the first representative of the family 

 observed so far south, though, strange to say, I did not find it else- 

 where. The weather not being quite so fine on our return journey, I 

 was unable to dredge in the Atlantic as I had hoped. At St. Sebastian 

 we called for Nordenskiold and the others, and arrived at Punta 

 Arenas again on February ig. Both in the Strait and at Porvenir 

 I secured specimens by dredging. 



On our initial programme the exploration of Lago Fagnano, 

 which has never before been attempted, was put as one of the most 

 important items after the researches in the eastern parts had been 

 carried out. This large freshwater lake was discovered three years 

 ago by the Chilian-Argentine Boundary Commission, and is represented 

 on maps as about go kilometres in length, 10 to 15 in breadth, and in 

 some places 90 fathoms deep. Its axis is from east to west ; it is 

 situated at the northern slope of the Cordilleras, and connected with 

 Admiralty Sound by Rio Azopardo. The whole expedition started 

 on February 25 for Admiralty Sound. At Rio Condor Dusen found a 

 specimen of humble bee, probably Bombus dahlboinii, which has never 

 before been observed in Tierra del Fuego. Three days afterwards 

 we arrived at Rio Azopardo, and, trusting the information given us 

 by the chief of the Boundary Commission that we would need only one 

 day to go up the river, Nordenskiold ordered the vessel to call for us 

 in twelve days. Then he, Akerman, I, and four others started at once 

 for the lake, while Dusen and the rest stayed at our camping-place on 

 the shore. However, we found that the difficulties of ascending the 

 river with a boat laden with a heavy cargo of tents, provisions, dredges, 



