530 General Notes. [May, 
he rebuts the inferences, showing that though some markings may 
be questionable, others are undoubtedly impressions of plants—— 
Professor Owen spoke upon generic characters in the order Saurop- 
terygia, before the London Geological Society, December 20, 
1882. Pliosaurus approaches nearer than Plesiosaurus to a gen- 
eralized Saurian type, as the teeth have the pair of strong enamel 
ridges upon the opposite sides which occur also in the Crocodilia, 
and the large size of the head and shortness of the neck show an 
approach to the fresh-water Saurians. Polyptychodon exhibits a 
third modification of the type. Professor Owen omitted to notice 
the important work of Seeley on this group. 
Silurian—Dr. Lindström has published a treatise upon the 
Upper Silurian fossils of the north-eastern part of Sz-tshwan 
(China). These chiefly belong to well-known Silurian genera, 
but include Gomphophora, a coral with completely perforate 
walls and six short spinous septa in each corallite; Ceriaster, 
which resembles Columnaria, but has interior dissepiments and in- 
creases by intracalicular budding; and Platyphyllum, allied to 
Calceola in the form of the cup, and to Goniophyllum in interior 
structure. Professor Winchell, in the tenth annual report of the 
Geological and Natural History Survey of Minnesota, refers the 
Keweenaw cupriferous red sandstones, shales and conglomerates ; 
the light-colored horizontal sandstones of the south shore of Lake 
Superior in Wisconsin (with fucoids and Scolithus), and the St 
Croix sandstone with its Lingulz and trilobites, to the Lower 
Silurian. 
Devonian—In the American Fournal of Science for February, 
Dr. H. S. Williams writes of a remarkable molluscan fauna at the 
base of the Chemung group, presenting much resemblance vi 
that of the Kinderhook group. The facts point to a Kinde 
fauna, the center of which was mid-continental, and a typ! 
Chemung fauna which had its center in the Appalachians. hiss 
blend at Ithaca, N. Y—In the same journal J. M. Clarke 
scribes three species of Dipterocaris, a fossil genus of ce 
from the Portage and Transition shales, and the lowest beds 
Chemung. 
: n Xournal of 
Science, Mr. C. A. White gives some observations upon the ga 
Tertiary —Where was the geological gaitar of ce n 
And Mr. Garman’s blizzard-killed cattle, wher 
