1917.] NATURAL SCIENCES OF PHILADELPHIA. 105 



VALLONIID^. 

 Vallonia perspectiva Sterki. 



• Silver Creek, Station 9, elevation 8,000 feet, in the forest zone, 

 and above its usual range. Much lower down it was taken at Station 

 42, Black Canyon, about 4 miles below the crest; in drift of the 

 Middle Percha below Kingston; Station 54, on Little Palomas Creek, 

 and in the Cuchillo Mountains. 

 Vallonia cyclophorella Ckll. 



On the crest at stations 16^, 39, and 47. 



FERUSSACID^. 

 Cochlicopa lubrica (Mull.). 



Found sparingly but generally spread throughout the Black 

 Range, from Silver Creek to Black Canyon; also on lower levels at 

 Station 1, Kingston, Little Palomas Creek, Cuchillo and San Mateo 

 ^Mountains. 



SUCOINEID^. 

 Succinea avara Say. 



Station 1, Gallina Canyon; Middle Percha below Kingston. Not 

 in the forest zone. 



PHYSID^. 



Physa sp. undet. 



^Middle Percha Creek, Kingston; Animas River near junction of 

 Cherry Creek; both in the eastern foothills of the Black Range. 



Collecting Stations in the Black Range. 



Many of the stations are plotted on the maps, pp. 84 and 85; most of the others 

 may be located by then* relation to those plotted. 



1. ^Middle branch of Gallina Creek about 2 miles above Pryor's upper cabin. 



2. Same, i miles above cabin, at the fork. 



3. 4. Limestone ledges on north and south sides of Silver Creek, a few hundred 



yards above* Mitchell Gray's cabin (7,500 feet). 

 4|. Silver Creek just below the "box," where the trail makes a detour. 



5. Silver Creek above the box, on north side, near a deserted cabin. 



6. Silver Creek, north side, a short distance above Station 5. 



7. Silver Creek, north side, above the preceding. 



8. Saddle above the head of Silver Creek. 



9. South side of the "box" of Silver Creek. 



10. Gulch tributary to Silver Creek on north side, near Strohm's "mine." 



11, 12. Gulch tributary to Silver Creek, about a mile south of Gray's cabin, 



and not far from the same elevation. 

 12 J. About a half mile above Spade's cabin, on Little Gallina Creek. 

 13. Branch of the head of Spring Creek (Bull Top Creek ?). 



15. Outcrop of limestone on east side of Spring Creek, where a small ravine enters 



from the east. 



16. Iron Creek, where a ravine with numerous prospect holes enters from the 



south, between confluence of Spring Creek and Wright's cabin. 

 16 j. Wright's cabin, near the head of Iron Creek. 



