86 THE NAUTILUS. 



2. Gepolis ( Hemitrochus} milleri Pfr. The color varieties of this 

 really beautiful shell are infinite indeed, no two specimens are en- 

 tirely alike. They cling to the under side of leaves and to the stems 

 of a certain species of shrub. Dead shells are scattered about in the 

 debris of fallen leaves. 



3. Ctenopoma hydii Weinl. Under slabs of eolian limestone; 

 about the roots of trees ; among fallen leaves. There is no actual 

 difference between this species and C. bryanti of Great Inagua. I 

 believe it is also reported from Long Island. (Plate V, figure 5.) 



4. Ghondropoma lijalmarsoni Pfr. Same station as the last. This 

 shell has a decided Haitian appearance and has evidently been iden- 

 tified as G. semilabre Lam. It is doubtful if Lamarck's species ever 

 occurs out of Haiti, indeed I am inclined to believe it is confined to 

 the " cul de sac " region of that island. C. hjalmarsoni is more obese 

 than G. semilabre, its decussated sculpture is not conspicuous, the 

 revolving stria? are more pronounced and the longitudinal striae less 

 so than in the Haitian shell. (Plate V, figure 6.) 



Fortune Island is easily accessible from New York, and offers an 

 excellent base for exploring the neighboring islands of the group ; 

 however, it requires much patience to tarry in a desert of poor col- 

 lecting when the larger Antillean islands with their magnificent 

 mountains and forests and incomparable molluscan richness lie but a 

 day beyond. 



COLLECTING SHELLS IN MONTANA. 



BY MORTON J. ELROP, UNIV. OF MONTANA. 



The State of Montana is not very productive of conchological speci- 

 mens. The conditions are all against shell growth. The rivers are 

 rapid, the water quite soft, and food in the rivers scarce. The large 

 lakes, as Flathead lake, contain clear, cold water. They are usually 

 deep, with rocky bottoms, and surrounded by mountains with steep 

 slopes. The marshy, stagnant parts of the lakes are usually small. 

 The mountain sides in summer become dry and parched, except in 

 protected portions and along the streams. Great stretches of plain 

 are without moisture for a portion of the summer, drying up every 

 living thing that cannot move to the water-courses. The days are 

 hot, the nights cool. In this mountainous State, where very little 



