PUPA. 



23T 



Fig. 407. 



(1843).— DeKat, N. Y. Moll. 50, pi, iv, f. 48 ; pi. xxxv, f. 337 

 (1843). — Pfeikfek, Mon. Hel. Viv. II, 359 ; iu Chemnitz, ed. 2, 125, 

 pi. xvi, f. 24-2G.— BiNSEY, Terr. Moll. II, 328, pi. lxxii,f. 1.— W. G. 

 BiNNEY, Terr. Moll. IV, 143. 



Pupa curvidens, GonLD, Invertebrata, 189, f. 120 (1841). 



Pupa tappaniana, Adams, Sillirnan's Journ. [i], XL, Suppl. ; Shells of 

 Vermont, 158 (1842).— Pfeikfek, Symbolae, II, 55. 



Leucochila pentodon, Mobse, Journ. Portl. Soc. I, 3G, f. 85 ; pi. x, f. '&Q 

 (1864) ; Amer. Nat. 667, f. 56 (1868). 



From Georgia and Mississippi to the most northern portions 

 of the Union. It is usually fouud at the foot of trees ana under 

 leaves. 



Animal blackish above, light gray below ; foot 

 moderately long, the transverse fissure very dis- 

 tinct, the anterior portion having the mouth in the 

 centre, and bilobate in front. Tentacles about one- 

 third as long as the eye-peduncles. Yery sluggish 

 in its movements, and carries the shell nearly hori- 

 zontally, or very slightly elevated. 



An enlarged view of the aperture is 

 given in Fig. 405. 



Jaw slightly arcuate, of uniform breadth, 

 anterior surface longitudinally striate, con- 

 cave margin minutely notched. 



Lingual membrane with 64 

 rows of 21 (10—1—10) teeth ; 

 centrals with three subequal, very 

 small cusps ; laterals bicuspid, 

 uncini serrate, the inner point 



much developed. Lingual dentition of Pupa pentodon. 



Aniniiil of 

 Pupa pentodon. 



Fig. 408. 



Jaw of Pvpa pentodon, 



[MOESE.J 



Fig. 409. 



Pupa decora, Gould. — Shell minnte, cylindrical, ronnded at apex, 

 thin, shining, translucent, of a wine-yellow color, regularly striated by 

 lines of growth ; spire of five or six closely revolving, rounded whirls, 

 deeply separated at the sutures ; aperture nearly round or semioval, 

 obliquely limited by the penultimate wliirl, armed with four slender 

 denticles, the large.st of them on the parietal wall, one on the columellar 



