PUPA. 330 



12. PUPA CORTICARIA, SAY. 

 PLATE LXXII. FIGUEE 4. 



P. testa albido-cornea, sub-cylindracea. obtusa ; anfracti- 

 bus quinque ; apertura sub-orbiculari ; columella dcnte 

 unico, prope angulum externum, armata ; et ad angulum 

 internum sub-dentata ; labro reflexo ; umbilico perforate. 



SYNONYMS AND REFERENCES. 



Odostomia corticaria, SAY, Nich. Encyc. IV. pi. 4, f. 5. 

 Pupa corticaria, GOULD, Boston Journ. III. 397, pi. 3, (. 19. 



DE KAY. New York Report, 31. 



KiisTER, in Chemn. 2d ed. tab. 13, figs. 19-20. 



PFEIFFER, Monog. Helic. Viv. II. 358. 



DESCRIPTION. 



ANIMAL. Superior tentacles long and club-shaped, 

 the inferior short and thick. Color whitish, darker upon 

 the head and tentacles. 



SHELL whitish, shining, cylindrical, obtuse at the apex ; 

 Avhorls rather more than five, convex ; suture well im- 

 pressed ; aperture lateral, two-thirds as wide as the last 

 whorl, sub-orbicular, with a single tooth on the pillar lip, 

 near the centre, and a toothlike enlargement near the 

 umbilical termination of the lip ; lip white, reflected ; 

 umbilicus very minutely perforated. 



Length one-tenth, transverse diameter one-twentieth, 

 of an inch. 



GEOGRAPHICAL DISTRIBUTION. Found in the Middle 

 Atlantic States, and those north of the Ohio. I also 



