Doll's Tertiary Fauna of Florida. — Schiiclurt. 143 
DALL'S CONTRIBUTIONS TO THE TERTIARY 
FAUNA OF FLORIDA.* 
This stupendous paleontologic and stratigraphic work was 
begun in 1885. Five years later the first printed result ap- 
peared, and during the past thirteen years six parts have been 
issued with more than 1650 pages of text and sixty plates of il- 
lustrations. Adding together the names recorded in the six 
indexes and allowing for duplication of names, we learn that 
Dr. Dall has examined into and made some statement to no less 
than 10,400 genera, species and varieties of Tertiary or Recent 
animals, mainly, however, mollusca. This immense amount of 
research work had to be done to adjust about 3,162 species of 
Tertiary mollusca occuring from the base of the Oligocene to 
the present fauna. 
In tliis work no special attention is given the Eocene 
faunas as these are being elaborated by professor G. D. Harris 
of Cornell University. It has been Dr. Dall's intention to ex- 
ploit "the Tampa silex beds, the Chesapeake Miocene, and the 
rich fauna of the Caloosahatchie marls." The material ac- 
cumulated so rapidly that "much of it had to be put aside in 
order to complete the work at all." 
"If the work were to be begun now for the first time, it is probable 
that the number of species would be greatly increased in the gastropod 
groups treated of in Parts I. and II. But this sort of thing would go on 
forever, so great is the richness of our Tertiaries, and an attempt to 
include the novelties thus passed over would have prolonged indefinitely 
the task in hand. Enough is known to render such a course unnecessary 
for drawing the broad conclusions which form the most important re- 
sult of these studies. 
"During the progress of this work approximately eight thousand 
three hundred and fifty sfSecies have been discussed or compared and 
eight hundred and sixty new forms described. More than fifty new 
group-names, from sections to genera, have been proposed and more 
than five times as many reduced to the rank of synonyms as unnecessary 
