THE NAUTILUS. 

 MOLLUSCA OF ARKANSAS. 



33 



BY F. A. SAMPSON, SEDALIA, MO. 



A report ou 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 Unionidse. 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- 

 sas. 



Selenites con cava Say. 

 Limax campestris Binn. 

 Zonites friabilis W. G. B. 

 Z. Irevigatus Pfeif. (Binney's 



Manual). 

 Z. demissus Binn. 

 Z. brittsi Pils.* 

 Z. ligerus Say. 

 Z. arboreus Say. 

 Z. viridulus Mke. 

 Z. indentatus Say. 

 Z. minusculus Binn. 

 Z. placentulus Shuttl. (Binney's 



Manual). 

 Z. fulvus Drap. 

 Z. undetermined. 

 Z. undetermined. 

 Z. gularis Say. 



TebennophoruscarolinensisBose. 

 Patula solitaria Say. 

 P. alternata Say. 

 P. perspectiva Say. 

 Helicodiscus liueatus Say. 

 Strobila labyrinthica Say. 

 Polygyra texasiana Mor. 

 P- triodontoides Bland. 

 P. jacksoni Bland. 

 P. dorfeuilliana Lea. 

 P. dorfeuilliana sampsoni Weth.* 



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.* 



Dorcasia berlandieriana Mor. 

 (Binney's Manual). 



Bulimulus dealbatus Say. 



Pupa fallax Say. 



P. arraifera Say. 



P. contracta Say. 



P. proceraGld. 



Succinea ovalis Gld. 



S. ovara Say. 



S. obliqua Say (Binney's Man- 

 ual). 



Helicina orbiculata Say. 



Limntea hu mills 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. 



