212 LAND AND FRESH-WATER SHELLS OF N. A. [^-^^^ L 



Bulimus modicus, W. G. Binn. = Pupa modica. 



Bulimus chordatus, Pfk. = Pupa chordaia. 



Bulimus decollatus and B. mutilatus, Say = Stenogyra decoUata. 



Bulimus subulus, W. G. Binn. = Stenogyra subula. 



Bulimus gracillimus, W. G. Binn. = Stenogyra gracillima. 



Bulimus harpa, Binn. = Helix karpa. 



Bulimus carinatus, Bkug., Encycl. Meth. I, 301 (1792) ; Bosc, IV, 89 



(Buccinum, Lister & Petiver), is an exotic Melanian, not inhabiting 



Virginia. 

 Bulimus urceus, Brug., Encycl. Meth. I, 298 (1792), from Mississippi 



River = Ampidlaria, q. v. 

 Melania striata, Perry, Conch, pi. xxix, f. 5, " New California," is Buli- 



jnus melania, Fercssac. 



Fossil Species of Bulimulus, &c. 



Bulimus limneiformis, Meek & Hayden, Proc. Acad. Nat. Sci. Philad. 



1860, 431 =Z5. ntbrascensis, I. c. 

 Bulimus Jloridanus, Coxrad, Sill. Am. Journ. Sc. [2], II, 399. 

 Bulimus perversus, Meek & Haydex = Clausilia contraria, M. & H. 



Subfamily ORTHALICIN^. 



Jaw composed of numerous separate plates. Teeth of the 

 lingual ribbon uniform, short, bicuspid.* 



ACHATINA, Lam. 



Shell oblong, aperture longitudinal or oval, angulated above ; 

 columella truncated towards the base of the 

 aperture ; peristome simple, acute. 

 ^M^S^\ Jaw composite. 



"^ ^^ Lingual membrane very broad with nu- 



Ja.\r of Achatina virginea. 



merous simuar stout teeth, apex recurved ; 

 central teeth long, narrow, simple. 



Subgenus LIGUUS, Montf. 

 Shell imperforate, solid, elongate-conic, apex acuminated, 

 variously fasciated ; whirls 7-8, the last equalling about one- 



' The lingual ribbon of'Orlhalicus undatus, as figured below, and Achatina 

 fr'.sciata do not agree with this description. 



