3-1 



A MANUAL OF AMERICAN LAND SHELLS, 



The following species are peculiar to this subregiou 



Vitrinozonites latissimus. 

 Zonites capnodes. 



subplanus. 



RugclL 



sculptilis. 



ElUotti. 



demissus. * 



2)etrophilus. 



Wheatleyi. 



Lawi. 



capsej^a. 



placentula. 



lasmodon. 



Andrewsi. 



cuspidatus. 



macUentus. 

 Paiula Cumherlandiana. 



Bryanti. 

 Helicodiscus fimhriatus. 

 Polygyra fastigans. 



Folygyra Troostiana. 



Hazardi. 

 IStenotrema s^nnosum. 

 lahronum. 

 Edgarianuni. 

 JEdvardsi. 

 harbigerum. 

 maxillatum. 

 Triodopsis Bugeli. 



introferens. 

 Mesodon major. 



Andrewsi. 

 Christyi. 

 Lawi. 

 Clarlci. 

 Wheatleyi. 

 Wetlierhyi. 

 Doivnieanus. 

 TebennopJiorns, Wetherbyi. 



Of these, several have spread beyoud the limits given above for the. 

 subregiou. Thus Zonites lasmodon and IStenotrema spinosum have been 

 found in Northern Alabama. Polygyra Hazardi has also spread into 

 Northern Alabama, and equally into Georgia and Kentucky. Bteno- 

 trema labrosum and Edgarianum in Alabama, and in one case have been 

 collected in xVrkansas. S. hat'bigerum, 8. maxillatum, and Zonites cap- 

 nodes have found their way into Alabama and Georgia; Mesodon Clarld 

 into Georgia. Zonites subplanus has been found even in Pennsylvania, 

 having, no doubt, crept along the mountain chain ; but no other of the 

 species of the Cumberland subregiou has been found as far north, ex- 

 cepting Z. demiss2is. This last named species is found in a highly de- 

 veloped state in Eastern Tennessee, and has extended into Western 

 Pennsylvania, North Carolina, Georgia, Alabama (near Mobile), and 

 Arkansas in a much dwarfed condition. 



If to the thirty-nine species catalog'ued above as peculiar to the sub- 

 region are added the sixty-nine species which inhabit it as a portion -of 

 the Interior ]U\gion (see pp.33, 34), it will be seen that in the Cumberland 

 Subregiou we liud the largest number of species of any portion of North 



