THE NAUTILUS. 



Ill 



The next day we left the main river and followed a slough that led 

 us into three large lakes that run to the foot of the mountains. The 

 banks are ten to twenty feet high and perpendicular. Near the water 

 was a stratum of shells (Macoma inconspicua Brod.), about four inches 

 thick. This locality is about 100 miles from the Aphroon mouth of the 

 Yukon. 



At an Indian camp below Holy Cross Mission I saw the right valve 

 of an Anodonta used as a spoon by an old squaw. She could not under- 

 stand, or would not, so I could not learn where it was found. She also 

 prized it so highly that, though offered a good trade, she would not 

 part with it. It was the size and color of our Anodonta orcyonensis. 



We made an early camp at Point Romanoff", which is about halfway 

 from the mouth of the river to St. Michael's, on the Arctic Ocean. 

 Here I had to make use of the same expedient that I used before to 

 "stand off" the mosquitoes, and found on the drift wood on the beach 

 specimens of Conulus fti/vus alaskensis Pils. and Pupa decora Gould. 

 After entering the canal that connects the Arctic Ocean with Norton's 

 Sound I found the small ponds that are common on the trundra full of 

 Limnsea palustris Miill., most of them of large size. I also found a 

 small bivalve very plentiful that was new to me, and I collected a 

 large number of them ; but, alas! they belong to the Crustaceans and 

 the other fellows are enjoying them. 



I did not find any marine shells at St Michael's, but when we stopped 

 at Unalaska, on the Aleutian Islands, I had a low tide to work on, and 

 on the rock spit near the dock collected and recognized the following 

 species : 



Purpura lima Mart. 



Buccinum fischerianum Morch. 



Volutharpa ampullacea Midd. 



Margarita helicina Fabr. 



Margarita albula Gould. 



Littorina sitchana Phil. 



Tritonium oregonense Redf. 



Eulima sp. 



Acmsea patina Esch. 



Pecten sp., dead shell. 



Saxicava rngosa L. 



Saxidomus squalidus. 



Modiola modiolns Lam. 



Mi/ 1 if us edulis L. 





