surface of the preceding whorl, and joining the extremities of 

 the labia; labium with a large, elongated, prominent tooth, 

 which is concave on the side towards the labrum ; labrum bi- 

 deritate ; a large tooth or fold far within the throat, caused by 

 the fold of the umbilicus ; throat much contracted by the 

 large tooth of the labrum into the form of a horse-shoe. 



" Total length less than one tenth of an inch. 



"This is a short, wide species, sufficiently distinct from 

 others, and readily distinguished by the lamina of the labrum 

 being much elevated, and by the magnitude of the tooth of 

 the labium. This species probably belongs to the genus 

 CARY'CHIUM." (SAY. Journ. Acad. Nat. Sc., II. 374.) 



Mr. Say found it in Virginia. It has since proved to be a 

 wide-spread species, and has been found in all the northern 

 range of States, wherever it has been sought for. When 

 fresh, it seems to be invested with a glutinous pubescence, by 

 which particles of earth become entangled and partially con- 

 ceal it. 



' PUPA ARM/FERA. 

 Plate III. fig. 10. 



P. testa grisea, cylindracea, obtusa ; anfractibus sex planulatis ; apertura semi- 

 ovali, dentibus quinque armata, quorum unus emarginatus labio, unus ad columellam 

 affixus. 



" Shell dextral, oblong-oval or somewhat obtusely-fusiform ; 

 suture distinct ; whorls six, obsoletely wrinkled ; aperture lon- 

 gitudinally sub-ovate ; exterior lip reflected, but not flattened, 

 interrupted above by the penultimate whorl, and with five 

 teeth, of which the superior one and that which precedes the 

 basal one are smallest ; labrum with an undulated lamelliform 

 tooth, its anterior extremity little elevated, but elongated, so 

 as almost to join the superior extremity of the exterior lip. 



" Length three twentieths of an inch. 



" Very distinct from P. corticdria, in being a much larger 

 and proportionally more dilated shell, and, with that species, 

 seems to belong more properly to the genus CARY'CHIUM of 

 Miiller and Ferussac." (SAY. Journ. Acad. Nat. Sc., II. 

 162.) 



