1889.] Geology and Paleontology. 631 
most of them in an excellent state of preservation, have been furnished 
by these beds, and two species have previously been described by 
Brougniart and by P2gerton. M. Sauvage mentions Amblypterus 
.fayo/i, etiryi, commentryi, renaulti, elaveris ; Cotmnentrya traquairi 
and C. brongniarti, Elaveria fayoli and E. gaudryi, and Comospo7na 
typica, and gives the leading characters and a side view of the head of 
Mesozoic. — Numerous species of Jurassic polyzoa, found at Bou- 
logne-sur-Mer, are described by M. H. E. Sauvage in the Bulletin de 
la Societe Geologique de France, 1889. Five of the species are new. 
H. Larrazet describes some fragments of a Steneosaurus found at 
Parmilieu (Isere, France), in the compact lime-stones of the upper 
part of the Bathonian stage which furnishes Lyons with free-stone. 
These fragments present some peculiarities, but the material is not 
sufficient to warrant the foundation of a new species (Bull, de la Soc. 
Geol., 1889). 
M. P. de Loriol has recently described two species of echini, one 
from the Senonian of Algiers, the other from the Cretaceous of Turke- 
stan. The latter is made the type of a new genus. 
M. Bertrand (Bull. Soc. Geol. France) contributes an interesting 
note relative to the horizontal folds or plis couches of the region of 
Draguignan. Some of these folds are so acute that a portion of an 
older. formation is completely enclosed by newer beds. 
M. Jules Welsch notes the presence of Gault and Senonian beds in 
the high plateaux of Oran (Algeria), and remarks that the maximum 
invasion of the Cretaceous sea over the more ancient strata took place 
at the lower Senonian epoch. 
The Cretaceous strata of a portion of Algeria, with the fossils con- 
tained in the different stages, are the subject of a long communication 
recently made to the French Geological Society. Albian (Gault), 
Cenomanian, and Senonian horizons are identified, and the Gault and 
Cenomanian are stated to be unconformable. 
Corasfer vilanazicp, a small echinid previously believed to belong to 
the Eocene, has recently been proved to be a Cretaceous species, and 
has been found in the Pyrenees at Alicante, and also atTersakhan, near 
Askhabad (Turkestan). 
The geological constitution of the environs de Puy (Haute Dome) 
from the Eocene to the Quaternary, forms the subject of a note pre- 
sented on January 21, 1889, to the French Geological Society by M. 
