The American Naturalist. [juiy. 
Tiber of fossils favors identification of 
hat the region is traversed by faults, a 
fact seemingly hitherto unperceived by geologists. 
M. G. Cotteau, continuing his researches among the Eocene echini ' 
of France, has discovered many new species, and described several 
others which previously had been mentioned but not described. Most 
of the forms seem to have been local ; those of the north of France 
and of the Paris basin are not the same as those of the southwest, and 
those of the Pyrenees and of the Mediterranean regions are again 
different. 
M. Landesque (Bull, de la Soc. Geol., 1889), describes and illus- 
trates the Tertiary strata of the Agenais and of Perigord (France). 
These strata, commencing with the upper Eocene, rest unconformably 
upon the Cretaceous, and their classification is by no means satisfac- 
torily made out. The lowest bed is a more or less homogeneous 
mass of sand, colored by oxide of iron, and above this commence 
alternations of beds of sand and of calcareous clay, in the latter of 
which have been found six species of Palgeotheria, two of Paloplo- 
therium, Pterodon dasyuroides, an Hyaenodon, Xiphodon gracile, and 
some crocodiles and chelonians. According to our author the white 
limestone of Perigord belongs only partially to the Eocene system, the 
two upper of the three beds of which it is composed belonging to the 
Miocene. The quadrupeds of the Miocene beds are much more nu- 
merous than those of the Eocene, and comprise species of Mustek, 
Hyaenodon, Cynodon, Amphicyon, Lutra, Cervus lamilloquensis 
(nov. sp.), Palffiochcerus, Anthracotherium lamilloquense (nov. sp.), 
Cainotherium, Amphitragulus, Rhinoceros lamilloquensis (nov. sp.), 
Theridomys, Arctomys, Erinaceus, Talpa, etc. There are also many 
undetermined crocodilians, some chelonians, and numerous debris of 
fishes, birds, batrachians, and snakes. These fossils have been found 
by M. Landesque at Lamilloque, Caillabet, and Comberatiere, es- 
pecially at the former places. 
M. Paul Gouret contributes to the Bulletin de la Societe Geologique 
de France, a geological study of the marine tertiary of Carry and 
Sausett (Bouches-du-Rhone, France). The locality is exceedingly 
rich in fossils, principally gastropods and lamellibranchs, but in- 
cluding some corals and echini. 
M. Cotteau has lately presented to the French Geological Society 
a memoir of the Eocene echini of the province of Alicante (Spain). 
Seventy-five species, belonging to seven families, are described for the 
