HELIX 8. 428. 129. 419 
2716. Helix septemvolva Say. 
T. umbilicata, subdiscoidea, solidula, superne oblique costu- 
lata, griseo - cornea vel cornea; spira plana vel leviter elevata, 
saepe medio vel lateraliter immersa; anfr. 7— 8!5, superne 
vix convexiusculi, penultimus saepe subobtectus, ultimus su- 
perne acute carinatus, non descendens, omnes subtus inflati, 
irregulares, sublaevigati, 3 exteriores plerumque in eodem 
plano umbilicum latiusculum infundibuliformem cingentes ; aper- 
tura subdiagonalis, reniformis; perist. tenuiusculum, leviter la- 
biatum, angulatim reflexum, marginibus lamina subelevata den- 
tifera junctis. — Diam. maj. 7!/—414, min. 6'/5 —12Y/,, alt. 
21/,— 93/5 mill. (Coll. Nr. 1342.) 
Polygyra septemvolva Say in Journ. Ac. Philad. I. P. 2. 4818. 
p. 278. Conf. Say's descriptions ed. W. 
G. Binn. 18856. p. 44. 
Heli sepiemvolva Fér. Hist. t. 51. £ 6. (Desh. LI. p. 5.) 
— -—- Wood Suppl. 18238. t. 7. f. 44. 
— -— Binn. in Bost. Journ. lll. 1841. p. 391. 
t $9. E. Perm MolL JI. p. [96. t. 38: 
— — Bland in Ann. Lyc. N.- York VIÉ. p. 132. 
p. 137. f 4. Conf. Pfr. in Malak. Bl. 
41862. p. 24. 
—  planorbula Lam. Nr. 86. p. 89. Ed. Desh. p. 67. 
-— -— Deless. Recueil t. 26. f, 3. 
—  cereolus Pfr. Mon. Hel. I. p. 408; IV. p. 313. Nr. 2016 
et in Chemn. ed. II. p. 378. Nr. 392. t. 66. 
f. 1—3. 
— —- Reeve Conch. ic. sp. 698. t. 119. 
— — (Ulostoma) Ajb. Helic. p. 95. 
s — (Polygyra) Mart. in Alb. Helic. ed. IL. p. 93. 
Habitat in Florida, Georgia, Alabama. 
* 
211*Y. (2017. volvoxis Parr. (Col. Nr. 1343.) Polygyra A?. 95, — 
Binn. Terr. Moll. IV. p. 92. t. 78. f. 47. — Bland in Ann. Lyc. 
N.-York VIL p. 136. —— An praecedentis var.? — Georgia, Flo- 
rida. (Il. 409.) 
8. 199. 
2718. (2018. Sayi Binnm. (Coll Nr. 1344) Binn. Terr. Moll. IV. p. 70. 
— Mesodon A?. 99. —  H. diodonta Say. —  Tridopsis Sayi 
Mórch in Journ. Conch. XII. p. 388. — Pennsylvania. (I. 382.) 
2119. (2019. tridentata Say. (Coll Nr. 1345.) Binn. Terr. Moll. IV. 
p. 70. — Triodopsis A4?. 98. —  Tridopsis tridentata Mürch in 
Journ. Conch. XIII. p. 388. — Kentucky. (I. 412.) 
2120. (2020.) fallax Say. (Coll. Nr. 1346) Binn. Terr. Moll. IV. p. 71. 
(t. 28.) — Triodopsis 4?. 98. — America bor. (I. 412.) 
27 * 
