398 . Monograph of the Species of 
Mr. Say compares it with T. enuscórum, of Monta- 
gu, not Linnzus, (P. wmbilicata, Drav.), to which it 
does not bear a very strong resemblance. . He states - 
it.to be very common under the bark of trees; but 
it certainly is very rare in collections. 
[ 
PUPA EXIGUA. 
Plate III. fig. 20. 
P. testa minutissimá, albida, oblongo- ovata, sub-acuminatà; an- 
fractibus quinque convexis ; labio per-obliquo, prope MOM inter- 
m dentato ; columellà sab dentatà ; labro revoluto 
fs * Shell dsectenls tapari oblong, | with ‘minute 
grooved lines; apex obtuse; whorls five; suture 
deeply impressed ; labium bolone ti superior tooth 
situate rather beneath the -middle of the lip, inferior 
tooth small, placed on the columella ; labrum mpi 
reflected, not flattened; umbilicus distinct. 
“Length more than one twentieth of an inch. 
“This is the smallest species I have seen.. Its apet- 
ture resembles that of P..(Cary’chium) corticaria; but 
the superior tooth of the labium of that shell is 
situate much nearer to the: superior termination of 
the labrum than the corresponding tooth, of, iat 
diminutive species. It is probably a Cary carom.” 
(Sax. Journ. Acad. Nat. Sc., Ml. 375.) 
: Mr. Say found it near Philadelphia. Professor Adams 
has obtained it near Middlebury, Vt., and it has been 
collected in various regions in Ohio, by Dr. 1 
Dr, Ward,- and Mr. J.-G. Anthony. A few speci- 
mens have been found under moist boards in Cam- 
bridge. 
