PAPERS ON ZOOLOGY 177 
at an angle of 45° but the rapid movements of the animal in 
crawling causes the shell to wabble from side to side. It is a 
voracious feeder. The eggs are tiny, 1.2 mm. by 0.99 mm. They 
are laid during April, and the young hatch in 21 days. 
GENUS PARAVITREA Pilsbry, 1898 
102. P. significans (Bland)—Brownfield and Cottonwood 
Woods, Champaign Co. Not common. This is the first record 
of this species in Illinois, and its range is thus extended about 
three hundred miles northward. Dr. Bryant Walker made the 
identification. Fourteen specimens were collected in three 
years, of these nine came from the Brownfield Woods. It occurs 
under logs, large limbs, ete., usually in the crumbly soil. In 
fact nearly all my material came from such soil. Moist, cool 
situations are preferred, and in the Brownfield Woods it was 
found only in the deepest ravines, and on the north slopes of 
these. In the Cottonwood Woods it was taken in the lowest 
portions, where the moisture was greatest. It appears to be 
subterranean in habits. It was collected with V. indentata, 
Z. arboreus, Circinaria concava (which feeds on it) and Pyra- 
midula alternata. It is a very shy species. Its movements are 
slow and careful. The shell is carried at an angle of about 30° 
from the horizontal. 
GENUS EUCONULUS Kobelt 
103. HE. chersinus (Say)—Brownfield Woods, Champaign 
Co. Not common. Under damp logs, in the interstices of bark, 
on fallen leaves, twigs, etc., and once under stones. It does not 
seem to prefer the very moist situations, and is usually associ- 
ated with Gastrocopta contracta, Paravitrea significans, Stro- 
bilops labyrinthica, Vitrea indentata, Zonitoides arboreus, 
Pyramidula alternata, Helicodiscus parallelus and Sphyra- 
dium edentulum. The animal is very shy. 
104. Z£. trochiformis (Montfort)—In Mr. Hart’s back yard, 
Urbana, under a log; not very common. 
Subfamily Ariophantinae 
GENUS ZONITOIDES Lehman, 1862 
105. Z. arboreus (Say)—White Heath, Monticello, Brown- 
field and Cottonwood Woods, Urbana, St. Joseph, Homer, 
Homer Park, Muncie, Oakwood, Hillery and Danville; almost 
+! 
4 
; 
