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The Nautilus 



Vol. XXIII. FEBRUARY, 1910. No. 9 



A COLLECTING EXCURSION NORTH OF THE GRAND CANYON OF THE 



COLORADO. 



In August last Messrs. J. H. Ferriss and L. E. Daniels set out to 

 extend the work begun by Ferriss and Pilsbry in 1906. From 

 Bass' Camp they crossed the Grand Canyon of the Colorado ; scaled 

 the northern rim, explored and collected in the Kaibab and Kanab 

 plateaux, finally reaching Kanab, in southwestern Utah. Beyond 

 the Grand Canyon, where we had worked in 1906, this was all a 

 virgin field conchologically. An account of their journey is here 

 extracted from a letter received from Mr. Ferriss. 



Friend Pilsbry : 



The Arizona expedition of 1909 is in the offing, to use a nautical 

 term. We felt worried until your letter was found at the end of the 

 trip. There was some danger of getting lost in the desert in an 

 eflFort to find us. A settler with a team from Mt. Trumbull a day 

 ahead of us was three days without water and just about all in when 

 he reached the Pipe Springs. We supposed you would come the 

 back-door route by Salt Lake so that in coming or going you would 

 pick up the Oreohelix found by Hemphill. 



Unexpectedly we made the trip to Mt. Trumbull via Fredonia, 

 Arizona and Kanab, Utah, and thus found the guide we had picked 

 out watching for you. On a side trip I went up to the lakes in the 

 mouth of caves along the Kanab Wash north of these villages, and 

 from what I saw and heard it will be an interesting conchological 

 trip along the mountains all the way to Salt Lake. It was at these 

 cave lakes that I found Succitiea hawkinsi of British Columbia. 

 We heard of Oreohelix with a Ions; nose but did not find them. 



