THE NAUTILUS. 139 



sional colony of Eutrochatella acuminata keeps our enthusiasm 

 warm, and then we discover a colony of that perfect little gem 

 among land shells, Eutrochatella chrysochasma, with its pinkish cast 

 and flaming red aperture. The big Ghondropoma shuttleworthi are 

 quite abundant and we only take the best looking specimens, but the 

 more rare Chon. sagebieni is much more shy ; we get but a few of 

 them living. Annularia blaini is everywhere, and we tell our Cuban 

 guide not to take any more of them. An occasional Pleurodonte 

 (7%e/.) rangeliana with its commoner cousin PL auricoma is taken. 

 Oleacina o. straminea and the smaller solidula along with the species 

 that have the incised lines upon their spires are fairly abundant. 

 Less so are the Rectoleacina cubensis and R. episcopalis, but they 

 are there to be had for the search. Some one warns the rest that it 

 is getting time to pull out for home, and we reluctantly drop the 

 work and scramble back to the river, an hour at least to go half a 

 mile. In the river we enjoy the luxury of a swim in the cool, clear 

 water, and revive our energies for the long " hike " back. 



Wherever the naturalist wanders there is always a beyond that is 

 gilded by imagination and mystery. From a high point we could 

 gaze into a beyond of high sierras among which our native guide 

 pointed out the great Pan de Guajaibon, far away and indistinct as 

 a cloud peak above the mass of mountains. Guajaibon has always 

 been our dream mountain for future conquest. It was visited a half 

 century ago by that most enterprising of Cuban collectors, Charles 

 Wright, but since then it has guarded well its conchological treas- 

 ures. 



DISTRIBUTION OF SOME FRESH WATER SHELLS OF THE ST. JOHN'S 

 RIVER VALLEY IN MAINE, NEW BRUNSWICK AND QUEBEC. 



BY OLOF O. NYLANDER. 



For many years I have been collecting shells in the valley of the 

 St. John's River and its tributaries, the Aroostook and Fish Rivers 

 in Maine, and Madawaska and Green Rivers in New Brunswick and 

 Quebec. Every tributary has some interesting forms, of which 

 many are peculiar to a single locality. Many of the tributaries of 

 St. John's River are in the forest. It is a lumbermen's field for 

 harvest, and great quantities of logs are floated down these rivers 

 every year. Sawmills large and small are to be found nearly every- 



