0. Meyer—Species in the Southern Old-tertiary. 459 
he identified very few of them with Claiborne fossils, but 
founded new species on very small differences. He had often 
to say “related to . . from Claiborne.” Afterwards he 
was of the st ot that the three beds had no species at all in 
common and gave new names to those which he formerly con- 
sidered rey It would be very difficult to defend this hy- 
pothesis even if no other species occurred in Jackson than those 
which he described, but with a better knowledge of the rich 
Jackson fauna it is impossible. The synonyms in parentheses 
in the table are the names used by Conrad. The table will 
explain itself in general and in the Pilinaias pages only such 
explanations are made as are necessary. The references to the 
literature of most of the species can be found in the American 
Journal of pein, | 1865, pp. 1-35. The numbers refer to 
those in the table 
3. From Jackson I have two specimens, which are otek: 
from Discoflustrellaria Bouéi Lea sp. in being flat and havi 
longer cells, I call them Discoftustrellaria Fackainoigh The ey 
may be a variety or different species, but are to be related to the 
Claiborne form 
7. Pecten Lyell Lea occurs also in Jackson. I would bats 
call attention to a characteristic mark that Lea does not me 
tion,—four or three teeth on the margin below the large wing. 
8. Pecten Deshaysi Lea is very similar to Pecten nuperus C. 
To this latter form I relate that species in Vicksburg which 
Conrad omits from his lists, though it is the most abundaut 
One in that locality. In Hilgard’s “Geology of Mississippi it is 
called Pecten Poulsoni. Ihave no typical Peecten Poulsoni Mor- 
r 
not. At first sight one be surpri ised, that I relate these 
f 
an 
which have a relatively large my and the Speaks in the 
ornamentation was of decisive value for me 
Pecten Lyelli and Pecten Deshaysi are probably only two 
eet valves of one species. 
. In Jackson occurs a spec a ee radiatus, 0. sp., 
tage with Lim. obliquus sey is m Claiborne, but some- 
what larger and having radiating ng The latter difference is 
which shows the same 
on the concentric strix 
hs ier two Claiborne species, Leda plicata Lea sp. and Leda 
anger of misrepresenting Mr. eres in gg Stel remove his Ger 
man a eee leads us to leave them as written.—Eps. 
