206 



TERRESTRIAL AIR-BREATHING MOLLUSKS. 



Pupa armifera, Say, Journ. Acad. Nat. Sci. Phila., II. 162 (1821) ; Binney's ed. 

 21. — Gould, Bost. Journ. Nat. Hist., III. 400, PL III. Fig. 10(1840); IV. 

 359 (1843). — Adams, Vermont Mollusca, 157 (1842); Silliman's Journ., [i] 

 XL. 271. — Pfeiffek, Symbol*, II. 53 ; Mon. Hel. Viv., II. 357. — DeKay, 

 N. Y. Moll, 52 (1S43). — Bixxey, Terr. Moll., II. 320, PL LXX. Fig. 4. — 

 Ku'ster, in Chemnitz, ed. 2, 57, PL VII. Figs. 17- 19. — "W. G. Bixney, Terr. 

 Moll., IV. 142; L. k Fr.-W. Sh., I. 241 (1869). — Gould and Binxey, Inv. 

 of Mass., (2), 437 (1870). 



Pupa rupicola, Pfeiffek, Symbolse, II. 55, teste Pfeiffer, in Mon. 



Leucochila armifera, Mouse, Amer. Nat., 6G7, Fig. 55 (1868). — Tryon, Am. 

 Journ. Conch., III. 306 (1868). 



Pupa armicjera, Potiez et Miohaud, Galerie, I. 159, PL XVI. Figs. 1, 2. 



Probably inhabits every State east of the Rocky Mountains ; thus belongs to 

 the Eastern Province. 



Animal black ; eye-peduncles long and slender ; tentacles conical and promi- 

 nent. Respiratory orifice very visible at the angle formed by the junction of 

 the peristome with the body whorl. 



The normal number of teeth, or that number which is most commonly ob- 

 served in adult individuals, is certainly 4 ; but, in addition to those described, 

 there is sometimes a small tubercle, or diminutive tooth, very near the junction 

 of the peristome and body whorl, and more rarely another of the same descrip- 

 tion, at the base of the aperture, near the umbilical tooth. If those only are to 

 be considered fully mature which possess all the teeth, then the species may be 

 characterized as having 6 teeth in the aperture ; but as one of them is nearly 

 always, and another generally, wanting, the description here given is correct. 

 The margin of the peristome is sometimes continuous entirely around the 

 aperture. 



Fig. 110. 



Pupa armifera. 



