154 The American Geologist. 
March. 1904. 
merely to the Floridian Miocene and does not include that of the more 
northern States. Under Pascagoula our collections include four species. 
Professor Smith and Mr. Aldrich announce the presence in the clay of 
ten more, and these have been added, though I have not seen them. 
"For the Shiloh list I am mainly dependent on Professor Whitfield's 
monograph with some additions from my own observations. For the 
"V'icksburg and Jackson lists I have similarly used Conrad's Checklists 
and included some, but not all of the late additions to these faunas. 
"In the cases of the Croatan and Waccamaw beds, the figures under 
Column A are taken from the Pleistocene of the Carolinas and not from 
that of North Creek, Florida. To emphasize this distinction the figures 
are enclosed in parentheses. The total number of species considered in 
these statistics is about three thousand one hundred and sixty-two. 
"Several of the localities have been very imperfectly explored, such 
as Pascagoula, the Orbitolite bed, Jacksonboro', White Beach, and the 
Ocala limestone ; but a fair number being known, it is probable that the 
percentages derived from it are not far wrong. I should mention here 
one factor which makes for usefulness in the figures of the table. Nearly 
all the collections were made by one man, faithful and devoted to his 
work, and whose instructions were to be as thorough as possible and 
take all the time needed. Under these circumstances it is believed that 
the results are more comparable than those depending on a number of 
different collectors varying in energy, persistence, and experience." 
A NEW FOOT-PRINT FROM THE CONNECTICUT 
VALLEY. 
By Joseph A. Cushman, Boston, Mass. 
PLATE VI. 
Among the immense number of foot-prints that have been 
obtained from the Triassic of the Connecticut valley are very 
few which show distinctly \vebbed feet. Even if slight im- 
pressions such as the web would make were left on the mud 
their trace would only be seen if the resulting rock were split 
at the identical surface on which the animal stepped. Below 
this the traces would be lost and only the features preserved 
which were more strongly impressed. Above it the filled in 
layers would show still less of it. On the true surface there is 
in many cases a difference in color. This is probably due to 
the results of standing water depositing very fine mud particles 
before the return of the succeeding tide, or to organic matter 
in the water deposited at the drying up of the water. 
