308 NATURAL HISTORY BULLETIN. 



The remaining three species, Helix (now Polygyra) thy- 

 roides, H clausa, and Helix (now Gastrodonta) gularis, are 

 found in the modern southern fauna and their occurrence in 

 the southern loess would not be surprising. Mr. Binney later 

 specifically reported P. clausa from the "post-pliocene" of 

 Natchez. In 1870, in the 2nd edition of Gould,* he similarly 

 reported nine of the foregoing species, of which the present 

 author failed to find but one at Natchez, namely H. thyjoides. 

 The variety bucculenta of this species does, however, occur at 

 Natchez, and may have been the form to which reference was 

 made. In 1878 Binney again similarly reportedf the nineteen 

 species already mentioned, and added Zonites (now Onipha- 

 lind) fuliginosa and Z. (now Gastrodonta) intertexta, and spe- 

 cifically reported Triodopsis (now Polygyra) obstricta from 

 "Natchez Bluff." These three additional species are southern. 

 The specimen reported as Zonites fnliginosus is really Ompha- 

 lina kopnodes ) a species not rare in the loess of Natchez. Gas- 

 trodonta intertexta (Binn.) Pils. is not known from Natchez, 

 but is found in the South. Polygyra obstricta is frequent in 

 the Natchez loess. The same species were again reported in 

 the text of his Manual of Am. Land Shells in 1885, but in 

 addition to this that work contains a catalogue of the Binney 

 collection donated to the U. S. National MuseumJ in which 

 twelve species are reported from the "post-pliocene" of Nat- 

 chez. They are the following: 



* Invertebrata of Mass., A. A. Gould. Edited by W. G. Binney, 2nd 

 ed. 1870. 



tThe Terr. Air-Breathing Moll, of the U. S. , vol. V. 

 + See Appendix IX, pp. 475-499. 



