228 THE CHICAGO ACADEMY OF SCIENCES. 
*Teeth five to seven, parietal tooth directed 
toward the center of the outer lip; base of 
Slrell' 7av2ded:..3 dis She oe ee ee ae (eae ofe oe armtifera 
**Teeth three to four, parietal tooth. directed 
toward the dase of the aperture; base of shell 
keeled, an elevated callus connecting termi- 
nations of peristomes <2 0b se cect Ua ee sice contracta 
*** Teeth generally six in number, parietal tooth 
directed toward the base of the aperture, bi- 
furcated; no elevated callus connecting peri- 
stome teriinationssc: 1745.4 Nes site hes ener ¢ holzingert 
3. Teeth numerous, but small, three basal teeth; pari- 
etal tooth simple. 
+Parietal tooth small, straight; eight teeth...,.. pentodon 
++ Parietal tooth larger, curved; six teeth........ curvidens 
4. Teeth generally small; alarge, elevated, long,curved 
gular lamina on the base of the aperture; two small, 
pointed parietal teeth .oy eis es aces Poet eee milium 
b.. Aperture much wider than long, triangular, with a pe- 
culiar bulge at the upper, right hand corner; teeth 
five to seven, one to three parietal, two columellar, two 
basal, all small’and-very long 57, ohec ss. a aeeee eae ovata 
GENus PUPOIDES Pfeiffer. 
Shell: ‘Turriculate, aperture with a strong lip, without 
any lamellze except a small, angular nodule.” (Sterki.) 
Animal: Blunt before and tapering behind; no caudal 
mucus pore or locomotive disk. 
88. Pupoides marginatus Say, pl]. xxx, fig. 9. 
Cyclostoma marginata SAY, Journ. Phil. Acad., Vol. II, p. 172, 1821. 
Pupa fallax SAY, of most American authors. 
Pupa arizonensis GABB,'Amer. Journ. Conch., Vol. II, p. 331, 1866. 
Shell: More or less tusiform, smooth; surface covered 
with very fine, oblique lines of growth, the apex being smooth; 
color brownish-horn, lighter on the apex; whorls six, convex, 
regularly increasing in size from apex to base; sutures im- 
pressed; aperture oval or rounded; peristome reflected, whit- 
ish, the reflected portion lined with a thick callus; termina- 
tions curved, the right one very much so; no denticles within 
the aperture; umbilicus open, deep. 
Length, 4.75; diameter, 2.00; aperture long, 1.30 mill. (10180.) 
es 5.00; i 2.00; % _ 1.30 “ (12408.) 
Animal: With the eye-peduncles, head, neck and fore 
part of the body black, the balance lighter; the animal is 
