PUPIDiE. 69 



t-8, somewhat tumid ; aperture depressly rounded ; peristome 

 thin, simple., margins approximating. Jaw and radula as in 

 Cylindrella ; inferior tentacles atrophied. 



Macroceramus, Guilding, 1828. 



Syn. — Leptospira, Swains., 1840. Colobus, Albers, 1850. 



Bistr. — 50 sp. West Indies and adjoining Continent. M. 

 Jeannereti, Gundl. (xcix, 59). 



Shell oval or cylindrically turreted,apex more or less obtuse; 

 whorls numerous, the last subangular ; aperture subcircular ; 

 peristome thin ; lips approaching, the columellar lip dilated and 

 reflected. 



The animal has a short foot ; inferior tentacles rudimentary ; 

 jaw similar to Cylindrella, very finely plicate ; radula elongated, 

 the central tooth small, obtuse, laterals and marginals similar, 

 palmiform, with elongated bifid internal cusps. 



The shell has usually a porcellanous white surface, here and 

 there spotted and striped with brown and ash-color. 



Mr. Bland believes Pupa vetusta, a carboniferous fossil of 

 Nova Scotia, to have belonged to this genus : Fischer has made 

 for it a section of Pupa, which he calls Dendropupa. 



Family PUPID^. 



Shell generally minute, multispiral, cylindrical, with obtuse 

 summit (Pupiform); aperture small, usually contracted by 

 internal teeth or lamellae. 



Jaw smooth or finely striated, sometimes with a superior 

 appendage resembling that of Succinea ; radula resembling Helix, 

 the central and lateral teeth similar, tricuspid, the marginals 

 transverse, very short and denticulated. 



Pupa, Lam, 1801. 



Syn. — Cochlodonta, Fer.,1820. Cochlodon,Lowe. 



Distr. — 3*77 sp. Universal, boreal and tropical. Fossil, 50 sp. 

 Carb., N. America ; Eocene — , Europe. 



Usually very small, cylindrical or oval-oblong ; umbilicus 

 slight or a mere slit ; plicate, striate or costellate, brown or horn- 

 color; columella plicate or subdentate ; lip reflected, usually 

 dentate or plicate within, the extremities usually joined by a 

 raised callus. 



Animal with a short foot, pointed behind ; lower tentacles 

 short. 



anostomella. Martens, 1867. Shell small, short egg-shaped, 

 ribbed, epidermis brown; lip expanded, without teeth. P.ascen- 

 dens, Martens. Amboina. 



TORQUiLLA, Stud., 1820. ( Chondrus, Hartmanu, 1821. G-ra- 

 naria, Held, 1837. Alloglossa, Lindstrom.) Shell oval-oblong or 



