Quarterly Journal of Coiichology. 383 



LIST OF MOLLUSCA COLLECTED AT MUSCATINE, 

 IOWA, U.S.A. 



By PROF. F. M, WITTER. 



Helicidae. 



Helix (Hyalina) arborea. Say. Abundant in all localities 

 where any protection is afforded. It seems to be some- 

 what gregarious. I have found 20-30 specimens crowded 

 together in hibernation. 



H. jMINUSCULA, Binn. Common with arborea. 



H. FULVA, Draparnaud. Somewhat rare; wide spread, in damp 

 woods; shell fragile. 



H. LiNEATA, Say. Rare, but widely distributed; under old logs 

 in damp woods or deep ravines. 



H. (Macrocyclis) concava. Say. Rare. It appears to prefer 

 dry or nearly dry woods; Wyoming Hills, and also R.R. 



embankment, one mile N. of Muscatine. 



H. alternata, Say. Common in many localities; seems fond of 

 loam rather than leaves or decaying wood. 



H. STRiATELLA, Authouy. Very rare; R.R. one mile N. of Mus- 



. catine. It is abundant in a deposit of Loess in this city. I 



found it 20-25 ffist below the surface, well preserved along 



with Helix pulchella, Miill. (not found here now), Succinea 



avara, Say, and Pupa (armifera?), Say. 



I find it under vines and large rose bushes in one 

 small spot on R.R. embankment. It seems to be about 

 extinct here. 



H. LABYRiNTHiCA, Say. Very rare; in this city in a grove on 

 bank of Mississippi river. I found it somewhat more 

 abundantly near DesMoines, Iowa. 



