190 AMERICAN JOURNAL 



18. Helix LJEViGATA, Pfi\ A smaller species than /w%mosa, 

 found in the hilly regions around Philadelphia, Monroe county, 

 and somewhat more abundant than fuliginosa in other parts of 

 East Tennessee. 



19. Helix lasmodon, Phillips. A rare species. 



20. Helix ligera, Say, var., (Plate 12, figs. 3, 4.) A 

 few specimens, which I am now disposed to regard as a variety 

 of H. ligera, were found in a dense coppice on Fork Greek. 

 When first presented to my notice I was persuaded they might 

 be regarded as an undescribed species, and designed to submit 

 them for publication as Helix Annce, which being preoccupied, 

 I thouglit to change to H. acerra. A more careful study of the 

 shells made it apparent they were unusually large specimens of 

 H. ligera Say, only very slightly elevated. On page 290, 

 " Land and Fresh Water Shells," Mr. W. G. Binney has figured 

 a shell (fig. 519) from the mountains of North Carolina, the 

 form and size of which is very near the form and size of my 

 shell. Mr. B. seems disposed to regard his shell as a var. of 

 Zonites inornata, which it possibly may be. But I suspect that 

 it is identical with the shell before me, in which case it will no 

 doubt prove to be a large form of IT. ligera hitherto little known. 

 My shell has seven whorls and a fraction. Greater diameter 

 0.81 inch = 18 mill. Dr. Binney says of ligera — " greatest trans- 

 verse diameter five-eighths of an inch (0,625), usually much 

 less." My shell exceeds the maximum given by Dr. B., by 

 about one-twelfth of an inch. One specimen found on Chilhowee 

 Mountains, Blount county. 



21. Helix major, Binney. Miss Law's shells are character- 

 istic in form and color, but are less in size than the maximum 

 given by W. G. Binney, whose measurement is 87| mill. My 

 largest shell is only 32 mill, excluding the lip. 



22. Helix monodon, Rackett. A rare shell in East Ten- 

 nessee. Only two or three found. 



23. Helix palliata, Say. A rare species. Half a dozen 

 found. 



24. Helix perspectiva. Say. An abundant species. Spec- 

 imens from Monroe county are of a lighter color than those 

 found in the valley of the Holston. 



25. Helix Rugeli, Shuttleworth. A somewhat abundant 

 species, variable in size ; more variable in the valley of the 

 Holston, Largest shell = 14| mill. Smallest shell = 7f mill, 

 largest diameter, lip excluded. 



