40 



common from Georgia to Texas, and which Dr. Binney regarded 

 as the southern form of H. thyroidus^ though some of his speci- 

 mens were labelled " clausa 7 " They have the globular form of 

 H. clausa, sometimes approaching even to H. elevata in height ; 

 the aperture is large and rounded, the umbilicus generally quite 

 closed, and the columella sometimes possesses and as often is 

 destitute of a tooth like H. ^7tz/rozrf«s. I think further observa- 

 tion will establish its claim as a distinct species, and in such case 

 I would propose for it the name of H. b'jcculenta. 



Another form, found in the south-western States, is allied to 

 H. appressa and H. palliata. It is a little more globular than the 

 former, has its peculiar imperforate base, but its aperture is more 

 open and roimded, and destitute of a tooth. H. Columbiana is 

 still more globular, smoother, with an open umbilicus and a pe- 

 culiar sinuosity of the lip. 1 would indicate this form by the 

 name of H. abjecta. 



Pupa variolosa. Testa minima, ovato-conica, rufa, sub-per- 

 forata, confertim indentata ; anfr. 4-5 turgidis ; sutura profunda ; 

 apertura oblique semiovali, dente columellari, altero labiali, altero 

 postico lamellari armata : labro vix reflexo. Long, j^^ P^^^- 

 Inhabits Florida. 



Smaller than any of our species except P. milium, and is dis- 

 tinguished by its short, conical form. The five specimens ex- 

 amined, all presented the crowded thimble-like impressions under 

 a magnifying power of 20 diameters. I think no other Ameri- 

 can species has the revolving tooth on the penult whorl. 



Pupa modica. Testa minuta, fragili, ovato-conica, elongata, 

 alba vel cornea, edentata, anfr. 5 convexis, V.fallaci simillima, 

 sed minore dimidio, anfractibus duobus carente ; apertura cam- 

 panulata, labro expanso, baud planulato. Long, y^^y, lat. -^^ poll. 

 Hah. Florida. 



Differs from F.fallax only in being one half its size, in having 

 two whorls less, and in having a bell-shaped aperture with a thin 

 revolute lip instead of a thick flattened one. 



Cylindrella pontifica. Testa parva, ovato-fusiformi, su- 

 perne attenuata, griseo et fusco marmorata ; anfr. ad 12 rotund- 

 atis, costulis crebris obliquis, alternis suturam praetereuntibus, 



