Worth American Jlelicidm. 59 



Helix avara, Say. 



Synonymy. 



Polygyra avara Sai/ Nich. Enc. Am. ed. 1816 



" Jl. Acad. N. S. Phi!. I. p. 277. 1818 



Helix " Fer. Trod., No. 97. 1822 



" " Pfr. var. /3. minor, Mon. Ilel. I., No. 1087 



(ex parte). 1848 



" " Desk, in Fer. Hist., p. 78, pi. 50, fig. 2. 



" " Chemn. ed. H., Helix, p. 370 (ex parte), excl. 



fig. 

 " " Reeve Concb. Icon, (ex parte), No. 720, excl. fig. 1852 



Polygyra " W. G. Binney reprint of Say, p. 11. 1856 



" " " Notes on Amer. Land Shells 



in Proc. Acad. Phila., p. 200. 1858 



Say's description is as follows : — 



P. AVARA. — " Shell covered with numerous short, robust hairs ; spire 

 convex ; whorls four, regularly rounded, with hardly elevated lines 

 forming grooves, which are much more conspicuous near the mouth ; 

 mouth subreniform, two projecting, obtuse teeth on the outer lip within, 

 separated by a deep sinus ; outer lip elevated, equal, describing two- 

 thirds of a circle ; pillar lip elevated, broadly but not profoundly eraar- 

 ginate, concave beneath, and connected to the inner side by an elongated, 

 lamelliform tooth, which is placed obliquely on the penultimate whorl 

 near the middle of the mouth ; lips almost equally prominent, continued ; 

 umbilicus moderate, not exhibiting the volutions, no groove on the ulti- 

 mate whorl within it. Breadth quarter of an inch. Inhabits Florida- 

 Cabinet of the Academy. Animal longer than the breadth of the shell, 

 acute behind, above granulated and blackish, beneath, and each side, 

 white. 



" This we found in the orange groves of Mr. Fatio, on the liiver St. 

 John, East Florida; it is usually covered with a black, earthy coat, 



