1893.] Geology and Paleontology. 1085 
The recent figures and descriptions of European Pterodactyls pub- 
lished by Professor Seeley have satisfied Mr. S. W. Williston that the 
generic characters of perenne: ME ie rig included in those of Orni- 
thostoma Seeley, an the Kansas species hither- 
to placed in the genus Pteranodon : may now be known under the earlier 
generic name of Ornithostoma, and the family as the Ornithostomatide. 
(Kansas Univ. Quart., Oct., 1893). In this same publication Mr. 
Williston gives a life size restoration of Clidastes veloz Marsh based 
upon an unusually complete specimen of this Mosasaur from western 
Kansas 
Two new species of invertebrates Ostrea munsonii and Radiolites 
davidsonii, from the Caprina limestone of Texas are figured and 
described by Mr. R. T. Hill. In a preface to the descriptions the 
author states that this formation is of great interest from the fact that 
in it we have all the species of the aberrant Chamids and Rudistes 
known to occur in the United States, with the exception of Corallio- 
chama of California and the Radiolites austinensis, forms common in 
the Upper Cretaceous of Alabama, Texas and Colorado. (Proceeds. 
Biol. Soe. Wash., 1893.) 
Mr. W. M. Fontaine's examination of the soloution of fossil plants 
from the Trinity division of the Comanche series of Texas results as 
follows: Equisetum, 1 sp.nov.; Ferns 1; Cycads 7, of which 1 is new; 
Conifers 10, 4 new, uncertain 4, of which 3 are probably new. The 
author considers the plant bearing portion of the Trinity to be some- 
what older than the basal Potomac strata, but the difference in age is 
not great. (Proceeds. U. S. Natl. Mus., 1893.) 
A small collection of fossil plants from the Kootanie group of Great 
_ Falls, Montana, has been examined by Mr. Fontaine. The specimens 
. show nothing but ferns, ey a and one Equisetum. The conifers are 
: badly preserved. Of the 9 ferns 5 are new, descriptions of which are 
given in the Proceeds. 8 Natl. Mus, Vol. XV with plates. Cycads 
are rare in the Great Falls flora, none being found in the collection 
examined. The one figured in the paper mentioned under the name 
Zamites montanensis, was obtained from this field by Mr. Williams, and 
is deseribed by Mr. Fontaine from a drawing. This collection con- 
firms Dr. Newberry's conclusions that the Potomae group, the Great 
Falls group, the Kootanie group of Canada, and the Kome group of 
Greenland are all of the same general age. 
Cenozoic.—In studying the Finger Lakes of Western New York, 
Mr. A. P. Brigham concludes that the basins are a composite 
