coLiMACEA. MOLLUSCA. PUPA. 187 



lower whorl, broadest above, and somewhat pointed in front ; lip 

 widely reflected, not flattened, so as to give a bell-shaped form ; 

 throat with three, and perhaps four teeth ; a large spoon-shaped 

 one, concave to the right side, seated on the transverse lip, and 

 greatly contracting the throat into something of a horse-shoe- 

 shape ; a very slight undulation near the top of the left lip ; an 

 oblong, thin tooth, seated at the front of the pillar, so far within 

 as scarcely to be discerned without breaking the shell ; and a 

 minute tooth about the middle of the right lip ; umbilicus large 

 and distinct ; last whorl indented at some distance behind the 

 outer lip. Length j\ inch, breadth ^\j inch. 



Found about old stumps, and decaying logs, usually under the 

 bark, and near the earth. It has been observed in most parts of 

 the United States. 



It is readily known by its whitish, translucent appearance, by its 

 bell-shaped aperture, and especially by its large, spoon-shaped tooth, 

 which gives such a peculiar form to the throat. The teeth at the sides 

 may rather be regarded as inward protuberances of the margin. It 

 appears to be covered with a hairy or glutinous coating, which causes 

 dirt to adhere to it. 



Pupa milium. 



Shell sub-oval^ wrinkled, light chestnut- colored ; whorls four, 

 suture moderate ; aperture heart-shaped, armed with six teeth ; um- 

 bilicus free. 



Figure 118. 

 State Coll., No. 92. Soc. Cab., No. 1140. 



Pupa milium, Gould ; Bost. Journ. Kat. Hist., iii. 402, pi. 3, f. 23. 



Shell minute, of a nearly oval form, color a light-chestnut ; 

 whorls four, or somewhat more, obviously wrinkled, rather con- 

 vex, arranged so as to form a bluntly rounded apex ; suture deep ; 

 aperture half the width of last whorl, heart-shaped, the apex 

 being its right upper angle ; the transverse margin is nearly direct, 

 the outer margin is scolloped by an indentation of the lip ; the 

 remainder of the margin is regularly rounded ; lip white, slightly 

 everted ; throat with six teeth, two of which are on the transverse 



