10 THE NAUTILUS. 



lfl A. CABINATA NICKLINIANA Lea, 1841. 



Tryon's insistence to the contrary (Monograph of the 

 Strep tomatidae, p. 395), this is an Anculosu. I think the 

 reason for Tryon's error may lie in the fact that a dwarf 

 form of Goniobasis virginica Gmel. was in his day distributed 

 as nickliniana. I have specimens from the type locality which 

 were sent to me by Mr. Robert Patterson of Chase City, Va. 

 Their generic position cannot be questioned. 



2 A. CORPULENTA Anth., 1860. 

 3 A. CANALIFERA Anth., 1860. 



4 A. DILATATA Conrad, 1834. 



Synonyms : Anculotus rogersi Conrad, 1834 ; Melanw inftata 

 Lea, 1838; Anculotus kirtlandianus Auth., 1840; Leptoxis 

 rapccformis Hald., 1843 (?) (on the authority of Tryon) ; 

 Anculotus carinatus Anth., 1860. 



5 A. ORNATA Anth., 1860. 



This is a form with Atlantic drainage antecedents which, 

 like dilatata, has crossed over into a western drainage. So far 

 as I know, it is confined to the Hiawassee of the Tennessee. 



Group of Anculosa trilineata Say. 

 1 A. TRILINEATA Say, 1829. 



Synonym: Melania viridis Lea, 1841. 



2 A. COSTATA Anth., 1840. 



Synonym: Melania occidentalis Lea, 1841. 



3 A. VIRGATA Lea, 1841. 



A distinct species, quite different from subglobosa Say 

 where Tryon placed it. 



4 A. MINOR Hinkley, 1912. 



5 A. ARKANSENSIS Hinkley, 1915. 



