1895.] Geology and Paleontology. 579 
the animal gorged itself with mud like many other sea-bottom animals. 
(Am. Journ. Sci., Vol. XLIX, 1895.) 
The eruptive rock in south central Wisconsin, classified as quartz 
porphyry by the state geologists, is described in detail by Weidman. 
The formation represents a volcanic outflow which took place over beds 
of Upper Huronian quartzite. The normal rock is a quartz kerato- 
phyre, but along the contact line with the quartzite occurs a zone of 
sericite schist from 150 to 200 feet wide. These schists are a dynamic 
alteration of the quartz keratophyre, and are not as Irving supposed, 
related to the Magnesian schists of Devil’s Lake. A third type of rock 
belonging to the series is volcanic breccia varying in size from an inch 
to a foot in diameter. The areal extent of the eruptive rock is greater 
than was formerly supposed. It was during an elevation which followed 
the outflow, that the overlying porphyry was metamorphosed, in part, 
into schist. (Bull. Univ. Wise. Sci. Ser., Vol. I, 1895.) 
= Mxsozorc.—M. Sauvage classifies the Dinosaurs found in the Upper 
Jurassic beds of Boulogue from 1863 up to the present time as follows: 
Sub-order Sauropoda. 
Fam. Atlantosauridæ, Morinosaurus typus Svg.; Pelorosaurus pre- 
cursor Sog. Fam. ? Dinosaurien de grande taille. 
Sub-order Theropoda. 
Fam. Megalosauridæ, Megalosaurus insignis E. E. Desl. 
Sub-order Ornithopoda. 
Fam. Iguanodontidæ. Iguanodon prestwichii Hulke. (Bull. Soe. 
Geol. de France [1894] 1895.) 
Geological News.—PLISTOCENE.—À study of the topography 
and distribution of the typical eskers of New England brings Mr. J. 
B. Woodworth to the conclusion that they are most easily explained by 
a subglacial origin, but segments occur where the cross-section departs 
from the limitations of the type and demands a channel open to the 
sky. (Proceeds. Boston, Soc. Nat. Hist., 1894.) 
Mr. R. E. Dodge offers the following hypothesis to account for the 
terraces of the Connecticut River: 
The Connecticut River occupies such a well-marked valley that it 
must have been the drainage channel of a large amount of water caused 
by the melting of the great glacier that overlay some portion of its 
alley. A part if not all of the waste in the terraces must have been 
