The Loess of Xatchcc. Miss. — Shiinck. 287 
found in the modern southern fauna and their occurrence in 
the southern loess Avould not be surprising. ]\Ir. Binney later 
specificall\- reported P. clansa from the "post-pliocene" of Nat- 
chez. In 1870, in the 2nd edition of Gould.* he similarly re- 
ported nine of the foreg"oing- species, of which the present auth- 
or failed to find but one at Natchez, namely H. f/iyroidcs. The 
variety biicculciita of this species does however occur at 
Natchez, and ma}- have been the form to which reference 
was made. In 1878 Binney again similarly reported! the nine- 
teen species already mentioned, and added ^oiiitcs (-now 
Ouiphaluia) fuUginosa and Z. ( noVv Gastrodonta) intcrtc.vta, 
and specificall}- reported Triodopsis ( now Polygyra) obsfricta 
from "Natchez Blufl^." These three additional species are 
southern. The specimen reported as Zonifcs fiiHgiiiosiis is 
really Oiiiphalina kopiiodcs, a species not rare in the loess of 
]\atchez. Gastrodonta iiitcrtcxta (Binn.j 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 
Natchez. They are the following : 
Macrocyclis (now Circiiiaria) coiicai'a 4 specimens. 
Zoiiitcs (now OiiipJialitia) fiiHgiiiosus i 
Stc)wt''c>na (now Polygyra) stciwtrciiuim 2 
liirsittitin 2 
" ■' " inonodon 4 
Triodopsis " " obstricta 1 
iiiUccta 4 
Mcsodoii " " albolabris 4 
clcz'atits 2 
I'.volctus 3 
claiisHS 4 
profundus 3 " 
It was the writer's privilege to examine this collection in 
1899, and he found that not only is the single specimen mark- 
ed Zonitcs fuliginosus (no. 38806 of the collection) doubtfully 
from the "post-pliocene," but it is Ouiphalina kopnodes. Air. 
*Invertebrata of Mass.. A. A. Gould. Edited by AV. G. Binney. 2nd ed . 
1870. 
tThe Ton-. Air-Broathine: Moll, of the I'. S.. vol. V. 
jSee Appendix IX. pji. *7..-iVy 
