10 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
In 1842 M. A. Pissis presented to the French Academy of Science a 
paper on Brazilian geology, in which he speaks of the Bahia sediments 
as both marine and fresh-water Tertiary. The only mention Pissis 
makes of palacontologic evidence is (р. 398) that the beds contain fossil 
pectens, oysters, and cythereas, — genera which later collectors have 
not found there, and which, if found, would not alone fix the Tertiary 
age of the beds. 
In 1859 Prof. T. Rupert Jones described a small collection (five 
species) of Entomostraca from Bahia. Professor Jones said of these 
fossils that they appear to be allied to recent and Tertiary species. In 
the same place 8. Allport describes vertebrate remains from the Bahia 
beds, among which are the scales of Lepidotus. "These two papers of 
Allport and Jones are the first we have that afford definite palacontologic 
evidence of the age of the Bahia sediments. Unfortunately the evi- 
dence is conflicting from the very beginning: the Emtomostraca are 
allied to recent and Tertiary species, while the Lepidotus is a Cretaceous 
species.” 
In 1869 Marsh described? from the Bahia basin Orocodilus hartti, 
which he says resembles a species from the Miocene of Virginia, and 
another from the Tertiary of New Jersey.* Another fossil vertebrate, 
Thoracosaurus bahiensis, he says, is probably allied to the modern 
gavials. 
In 1870 Hartt's book on the geology of Brazilº appeared, in which 
he speaks of the beds of the Bahia basin as lower Cretaceous (p. 350), 
and possibly Necomien (p. 555). He describes from these beds a few 
new fossils, and gives much data upon the details of geologic structure 
about the Bahia basin, but there is nothing that can be regarded as 
having diagnostic value in a doubtful case, and no palaeontologic evi- 
dence to warrant the reference of some of the beds to the Lower Creta- 
ceous and others to the Tertiary (p. 377). 
1 Mémoire sur la position géologique . . . de la partie australe du Brésil. Mém. 
de l'Institut de France, X. р. 859-412. 
2 On the discovery of some fossil remains near Bahia in South America. 6. 
Allport, T. Rupert Jones, Note on the fossil Entomostraca from Montserrate. _ 
Quarterly Journal Geological Society, December, 1859, ХУТ., р. 263-268. Lon- . 
don, 1860. 
3 O. С. Marsh, Notice of some new reptilian remains from the Cretaceous of 
Brazil. Amer. Journ. Sci., XCVII., p. 390-392. New Haven, 1869. 
4 Dr. A. Smith Woodward notes that this is a detached tooth, and should not 
be considered in this connection. (Private letter, Nov. 7, 1902.) 
5 Ch. Fred Hartt, Geology and physical geography of Brazil. Boston, 1870. 
