THE NAUTILUS. op 
MOLLUSCA OF ARKANSAS. 
BY F. A. SAMPSON, SEDALIA, MO. 
A report on the shells of Arkansas, made to the State Geologist 
of that State, will soon be published, and in this paper I will give 
the list of species, not including the Unionidee. 
I have collected in 
twenty-five counties, but not equally in all—in some having made 
search in many different places and at different times, and in others 
in only one place or at one time. 
The type specimens of those species marked * were from Arkan- 
Ny p | 
sas. 
Selenites concava Say. 
Limax campestris Binn. 
Zonites friabilis W. G. B. 
Z. levigatus Pfeif. (Binney’s 
Manual). 
Z. demissus Binn. 
. brittsi Pils.* 
. ligerus Say. 
. arboreus Say. 
. viridulus Mke. 
. indentatus Say. 
. minusculus Binn. 
. placentulus Shuttl. (Binney’s 
Manual). 
Z. fulvus Drap. 
Z. undetermined. 
Z. undetermined. 
Z. gularis Say. 
Tebennophoruscarolinensis Bose. 
Patula solitaria Say. 
P. alternata Say. 
P. perspectiva Say. 
Helicodiscus lineatus Say. 
Strobila labyrinthica Say. 
Polygyra texasiana Mor. 
P. triodontoides Bland. 
P. jacksoni Bland. 
P. dorfeuilliana Lea. 
P. dorfeuilliana sampsoni Weth.* 
NNNNNNWN 
M. divestus Gld. 
M. elevatus Say. 
M. exoletus Binn. 
M. exoletus minor. 
M. thyroides Say. 
M. thyroides bucculentus Gld. 
M. clausus Say. 
M. kiowaensis arkansensis Pils.* 
Doreasia berlandieriana Mor. 
(Binney’s Manual). 
Bulimulus dealbatus Say. 
Pupa fallax Say. 
P. armifera Say. 
P. contracta Say. 
P. procera Gld. 
Succinea ovalis Gld. 
S. ovara Say. 
S. obliqua Say (Binney’s Man- 
ual). 
Helicina orbiculata Say. 
Limnzea humilis Say. 
L. columella Say. 
L. catascopium Say. 
Physa gyrina Say. 
P. heterostrophe Say. 
Planorbis trivolvis Say. 
P. bicarinatus Say. 
Ancylus tardus Say. 
Vivipara contectoides W.G. B. 
