66 Asus 
CONCHOLOGISTS’ - EXCHANGE. 
have been collected by my son, Philip Marsh, 
in the Illinois River, in Peoria Lake and in the 
river at Beardstown, county. I have 
never found this species in the river, only in the 
sloughs near it, and it must be extremely rare 
as but a few dozen specimens have been ob- 
tained. Specimens of /zvipara from Europe 
labled V. Lister’, V. Lungare, V. vivipara 
and I’. contecta appear to me to be very closely 
allied to it. 
Cass 
GENUS CAMPELOMA, RAFINESQUE. 
71.—Campeloma subsolida, Anthony. 
Shell ovate, imperforate, spire elongated, very 
thick and: heavy; sutures very distinct; whorls, 
from 6 to 7, sometimes rather flat, at times 
rounded and inflated. Epidermis light green 
to light brown when adult; aperture broad, 
ovate rounded before, angulated posteriorly, 
white within ; peristome continuous with heavy 
callous over parietal wall; margined with black 
epidermal tissue lines of growth very promi: 
nent. ‘This fine species is very abundant in the 
river and along the margins of our sloughs and 
lakes, always, “preferring muddy or very fine 
sandy bottom, and it is also found in all the 
small creeks of the county. In the sloughs it 
attains a large size, but it is very much smaller 
in the creeks. Where there is less lime and 
more iron ore, the creek specimens besides 
being much smaller, usually have a darker epi- 
dermis. Sometimes the river forms are malle- 
ate; and it is not unusual to find specimens 
with a reversed spire; and again, I have found 
that heterostrophic specimens average about 
one in every 200 collected. The animal of 
Campeloma seems to be effected by extreme 
heat and cold, and I have found vast numbers 
of dead specimens in the sloughs when, during 
the Summer, the water is very low and highly 
heated. The animal of this species usually 
begins to disappear by the middle of September, 
and buries itself deeply in the mud, where it 
hibernates until early Spring. 
72.—Campeloma extlis, Anthony. 
Shell turreted, smooth, 
green; spire elevdted ; 
sutures well marked; 
thick; color light 
whorls from 6 to 7; 
aperture small, broad- 
ovate, livid within, sometimes white; umbilicus 
variable, either open or closed; whorls variable, 
either angular or flat; growth lines distinct. 
This species is regarded by many as identical 
with C. coarctata, Lam., while others claim it 
to be asexual counterpart of C. sebsolida, Anth. 
It is found here in but one locality, Sturgeon 
Bay, at the lower point of Bay Island, where it 
seems to be rather common. It is quite variable, 
as some specimens are found with a distinct pale 
revolving band encircling all the whorls, while 
many others haye the whorls very much angu- 
lated; and again, others are found with very 
flat whorls, 
73.—Campeloma rufa, Haldeman. 
Shell imperforate, elongately ovate, thick, 
rather smooth, often polished and shining; 
growth lines sometimes rough; body-whorl 
often malleated; epidermis dark olive, shading 
to green; location of former peristomes dis- 
tinctly marked by dark brown or black sigmoid 
streaks, reddish under the epidermis; whorls 
5 to 7, pinkish to the apex; slopingly convex, 
near the suture sometimes slightly angulated ; 
aperture slightly oblique, ovate, reddish within. 
This shell is rare here, only a few specimens 
having been found in two localities, viz: at the 
point of a small island at the junction of Lakey 
and Hanneman Sloughs, and near the outlet of 
Swan Lake, on the Bay Island. The few 
specimens obtained are, however, very much 
nearer typical than the majority of specimens 
in my cabinet from other localities, the rufous 
or reddish appearance of the epidermis, and 
the pinkish color of the entire apex in all stages 
of its growth, will readily distinguish this spe- 
cies from all others. 
GENUS-LIOPLAX, TROSCHEL. 
74.—Lioplax subcarinata, Say. 
Shell varying from broad-oval to subcylindri- 
cal in form, thickness variable; color of epi- 
dermis ranging from light olive to light green, 
often shining; smooth, imperforate; whorls 
from 5 to 6, body-whorls rounded, sometimes 
subcarinate, remaining whorls carinate or sub- 
carinate, reticulated with striz and wrinkles ; 
sutures deeply impressed; whorls often entire 
