196 PROCEEDINGS OF THE ACADEMY OF [Oct., 



stitute new records for the state, and one, the interesting Polita 

 chersinella (Dall), has previously been known only from the Cali- 

 fornian Sierras. One subspecies, Oreohelix cooperi apiarium is here 

 described as new. Euconulus fulvus (alaskensis ?) proved by all 

 odds the most abundant and widely distributed species in the Park, 

 being taken at 14 of the 18 stations. Other relatively abundant 

 forms are Vertigo modesta parietalis (a good second to Euconulus), 

 Oreohelix cooperi apiarium, and Thysanophora ingersolli (though for 

 both of these last two species the figures to be quoted include dead 

 shells). We did not discover how to find the Oreohelix or the Polita 

 hinneyana until toward the end of the trip, else the figures for each 

 of these might have been larger. 



It is evident that the fauna as a whole exhibits a markedly boreal 

 or Hudsonian aspect, in which the occurrence of such species as 

 Oreohelix cooperi apiarium, Polita chersinella, and Punctum cali- 

 fornicum seems more or less anomalous. Quite unexpectedly the 

 list is an altogether different one from that collected by the late 

 Mr. L. E. Daniels in the Bitter Root Mountains and reported upon 

 by Mr. Vanatta in these Proceedings for 1914 (Vanatta :14). 

 Though his list is a much more extensive one, some seven species, or 

 just one more than half of those here recorded, fail to appear therein. 



A first duplicate series of the specimens taken has been deposited 

 in the collections of the Academy, 



Historical. 



In my search of the literature I have been unable to discover any 

 previous record of Mollusca taken within the actual confines of 

 the Glacier National Park with the single exception of a note by 

 F. C. Baker (:14, p. 106), wherein he mentions finding some dead 

 shells of Oreohelix cooperi "at Glacier National Park, Montana, in 

 a ravine about a mile west of the hotel." 



Some collecting was done by Dr. G. M. Dawson in 1874, and 

 Mr. J. B. Tyrrell in 1883, just north of the present Park near Water- 

 ton Lake on the Canadian side of the boundary, and Oreohelix cooperi 

 limitaris {Helix limitaris Dawson) was described from the material 

 taken, but most of the records seem never to have been published. 



List of Stations with Data. 



The recorded stations from which mollusks were taken on this 

 expedition are eighteen in number, being in consecutive order as 



