1046 General Notes. { December, 
of some of the segments of the carapace shows the latter to have 
been undeveloped, which is further consistent with a relation 
ancestral to the other armadillos. It is probably a case of persist- 
ence, however, for since the Miocene beds of the Parana have 
been shown by Ameghino to contain ancestral Glyptodontide, 
the North American ancestors of these are to be sought in beds 
earlier than the Loup Fork. The species was discovered by Mr. 
Charles H. Sternberg, in Northern Kansas. It is respectfully 
dedicated to Professor F. H. Snow, of the university of that State. 
GEOLOGICAL News.—General—In these days of earthquake 
theories that of M. De Montessus (Rev. Scient., 1886, 369) is 
worthy of notice. He starts by enumerating the three chief the- 
ories of the constitution of the earth: (1) A central fluid nucleus 
with a more or less thick crust; (2) a central solid nucleus and a 
solid crust separated by a spherical liquid ring ; (3) a solid inte- 
rior with chambers filled with fluid. Postulating the correctness 
of the first theory, which prevails in France and holds its own in 
other countries, he then gives, as the result of calculations made 
upon 4943 shocks, the statement that earthquakes are more fre- 
quent when the moon is on the meridian than when it is at right 
angles with it. From this he passes to the fact that were the 
ocean composed of a dense fluid, like mercury, the tides would 
consist of an actual transport of matter following the moons 
course, May not such tides take place below the earth’s crust ? 
Capt. Boulanger, in 1880, dared to doubt that the earth moved as 
a whole, so that the velocity of every point is proportional to its 
distance from the center. The patient study of the sun spots has 
proved that there is in the sun’s matter an internal and external 
circulation quite different from that which would result from a 
rotation in every point proportionate to the radius, Vortex mo- 
tions, according to M. Faye’s law, must be produced in fluids the 
layers of which are in movement with slightly differing veloci- 
ties. Add these vortex movements to the subterranean lunar 
tides, and M. Montessus’ earthquake theory is outlined. : 
Paleozoic—Professor Ed. Hull, Mr. Mellard Reade and others 
in Britain, with Mr. Crosby in America, maintain that in Palæo- 
zoic times the North Atlantic and the North American continent 
in the main changed places. In the words of the first of these: 
“Tf it be allowed as a general principle that the originating u 
Jay in the direction towards which the sediments thicken, am 
opposite to that in which the limestones are most developed, n 
coħclusion is inevitable that the Atlantic was, in the main, a lan 
surface in Palaeozoic times.” 
. Permian.—M. Alb. Gaudry describes Haplodus baylei, a reptile 
_ from the Permian beds of Telots, near Autun (France). |” 
‘name is derived from Greek words which signify the close adhe- — 
sion of the teeth to the maxillaries. Three other types ee 
