PUPA. 



241 



Fig. 417. 



Pupa iBOrdeacea, Gabb. — Shell rimate, cylindrical, thin, scarcely 

 striate, pellucid, horu-color ; spire elongated, apex obtuse; whirls five, 

 convex, the last equalling one-third the shell's length ; aper- 

 ture truncate-ovate ; peristome thickened, white, reflected, not 

 continuous ; one twisted, tooth-like, entering, prominent fold 

 upon the parietal wall of the aperture, and one prominent 

 upright tooth within the aperture at its base. Length 21, 

 diam. | mill. 



Pupa hordacea, Gabb, Am. Journ. Conch. II, 331, pi. xxi, f. 



7 (186(3). 



Arizona, at Fort Grant, junction of Arivapa and San 

 Pedro Rivers. 



Mr description and figure are drawn from an authentic 

 specimen. 



FiK. 418. 



Pupa claordata;) Pfeiffer. — Shell rimate, cylindrically oblon?, 

 thin, marked with oblique, somewhat separated cord-like ribs ; 

 pellucid, horn-colored ; spire elongate, apex obtuse ; whirls 

 five and a half, moderately convex, the last hardly surpassing 

 one-fourth the shell's length, rounded at the base ; aperture 

 oblique, oval ; peristome thickened, white, slightly reflected in 

 its whole length, its extremities approaching, the columellar 

 slightly arched. Length 4, diam. 1 mill. ; of the aperture 

 scarcely 1 long. 



Bulhnus chordatus, Pfeiffeb, Mai. Blatt. 111,40; Mon. Hel. 

 Viv. IV, 420. 



Mazatlan. 



The specimen figured was received from Dr. Pfeiffer. 



Pupa armifera, Say. — Shell cylindrical, sub- 

 fusiform, smooth ; whirls six to seven, convex, the 

 three next the aperture of about equal diameter, the 

 posterior three diminishing and forming a rather 

 obtuse apex ; suture impressed ; peristome white, 

 thin, subreflected, forming the whole outline of the 

 aperture, except a small portion of the body-whirl, 

 where a thin, testaceous deposit connects its two ex- 

 tremities ; aperture lateral, nearly oval, deep, cup- 

 shaped, and narrowing towards the throat, which is 

 almost filled up by projecting teeth ; white within ; 

 teeth commonly fouj^ one of which, affixed to the 

 body-whirl, commences at the superior margin of the 

 aperture, near the junction of the peristome and ulti- 

 1(J January, 1869. 



Fi2. 419. 



Pupa ormiffirn, 

 enlarged. 



