sa 
390 0O.C. Marsh on new Reptilian remains from Brazil, 
Tin-stone Sn0, or Sn, “0 Ba 
Rutile TO, or . Ti, *0.5*" Ti, 
Zircon Zr20,3 Li or at, Ds ne 
Garnet Ray [Ry] *" 07" Bi, 
Spinel R,[R,]""0, or R, [Rj }" Oyo [Re]o 
Such facts as these do not of course prove anything. They 
are however suggestive, and are adduced because they illustrat 
the use that may be made of this principle of atomic ratios. 
Arr. XL,—Notice of some New Reptilian Remains From the 
Cretaceous of Brazil; by Prof. 0. CG, Marsg, of Yale College. 
Tue only account of vertebrate fossils from the fresh-water 
cretaceous deposit near Bahia, Brazil, which appears to have 
, been published hitherto, is a short notice in a paper by Mr. 8. 
Allport, in the Journal of the Geological Society of London 
for 1860. In this article the author gives a description of the 
_ locality, and figures several specimens of reptilian and fish re- 
_- Inains, but with no explanation of them except a reference to 
_ the opinions of Prof. Owen, and Sir Philip Egerton, as to their 
general affinities, 
While engag 
Brazil, in 1867, Prof. G. F. Hartt, of Cornell University, vis- 
ited the same locality, and among the fossils obtained was & 
small collection of vertebrate remains, supposed to be mainly 
an, which he has recently submitted to the writer for ES: 
mination and description. Most of the specimens are too 1m- 
perfect to admit of accurate determination, but some, however, 
we sufficiently well preserved to show clearly their main char- 
cters, sone a number of them prove to be identical with those 
in 
tazil, in a work on the geology of that region, soon to be pub- 
lished by Prof Hartt. ine 
© most interesting of the reptilian remains collected by 
Prof. Hartt in the Bahia deposit is the tooth of a large Croco- 
om the arenaceous shale near Plantaforma station, 00 
railroad, i i 
