628 General Notes. [ October, 
tions to each other, as well as in all the topographical effects they exercise 
on the surface, they exactly reproduce the Pennsylvania mountains. I 
now have no question that the Alleghany disturbances are crowded into 
the valley of the Hudson, where, worn down by glacial, fluviatile, and at 
times perhaps marine agencies, and masked by glacial drift, they have 
hitherto escaped the attention of geologists, and that we must abandon 
the idea that the disturbances of that age run out beneath the Catskill 
table-lands. j 
That it may be seen that these anticlinals are no petty accidents, I 
may say that the largest yet traced is not less than twenty miles long, a 
mile or more in width, and if restored would be nearly two thousand feet 
high. The beds involved in the disturbance include the greater part of 
the New York Paleozoic section. — N. S. SHALER. 
ON THE OCCURRENCE OF THE GENUS BEATRICEA IN KENTUCKY. — 
The genus Beatricea described by Billings as a group of fossil corals, 
and at one time regarded by Hyatt as belonging to the Cephalopods,’ 
has hitherto been found only upon the island of Anticosti, in the Gulf 
of St. Lawrence. The investigations of the Kentucky Geological Sur- 
vey have now traced this genus into the limits of that commonwealth. 
There, as in Anticosti, it is the companion of reef-building forms of 
corals growing in the shelter of very large masses of Columnaria and 
Tetradium, and occupying the horizon of the uppermost part of the Cin- 
cinnati group. In the new locality the genus is represented by two dis- 
tinct forms, comparable with the B. nodulosa and B. undulata of Bil- 
lings, though perhaps not strictly identical with them. Specimens of 
these Kentucky forms were exhibited at Nashville. Professor Whitfield, 
there called attention to the fact that the microscopic structure of this 
puzzling fossil closely resembled that found in the Stromatopora group: 
-On further examination of these forms I am inclined to accept the conclu- 
sions to which we are led by this acute observation of Professor Whitfield 
and to regard these fossils as probably belonging to the group of sponges. 
Those who are familiar with the Palæozic sponges will recognize omae 
approaches to the general form of Beatricea among the unquestionable 
sponges of that time. Certainly the affinities as far as traced are mu i 
more reconcilable with those of the group of sponges than with those 0 
the corals. I think this is a more profitable field of inquiry than any 
other that has suggested itself to me concerning these curious remains. 
For some years I have been doubting whether they had not some p 
relations with the Hippurite group of the Rudistes. I should not a 
tion this conjecture, though there is a good deal that appears to Sup. 4 “ 
it, were it not that Prof. James Hall tells me he has been inclined 
take the same view of their relations. There can be no doubt, bowery 
that the field opened by Professor Whitfield’s observations is much mom” 
promising. — N. S. SHALER. | 
1 I am authorized by Professor Hyatt to say that he is now satisfied that they can- 
not be regarded as Cephalopods. 
