270 The American Geologist. October, 1893 
RECENT PUBL ICATIONS. 
/. Government and State Reports. 
Geol. Survey of N. J. From the Annual Report of the State Geol- 
ogist for 1892. Surface Geology. Report of Progress, R. D. Salisbury. 
Geol. Survey of Alabama. Report on the Geological Structure of 
Murphree's Valley and its Minerals and other Materials of Economic 
Value. A. M. Gibson, Asst. Geologist. 
U. S. Geol. Survey, 11th Annual Report. Part I contains: The 
Pleistocene History of Northeastern Iowa, W J McGee; The Natural 
Gas Field of Indiana, A. J. Phinney. 
Part II contains: Report on Irrigation, Major J. W. Powell. 
Geol. Sur. of La. A preliminary Report upon the Hills of Louisiana, 
South of the Vicksburg, Shreveport and Pacific Railroad, to Alex- 
andria, La., Otto Lerch. Part II, 1893. 
II. Proceedings of Scientific Societies. 
Proc. and Trans, of the Nova Scotian Institute of Science, Vol. I, Pt. 
2, contains: Notes on concretionary structure in various rock forma- 
tions in Canada, T. C. Weston; Evidence of the post-glacial extension of 
the southern coast of Nova Scotia, W. H. Prest; The Geology of Cape 
Breton — the Lower Silurian, E. Gilpin; Catalogue of Silurian Fossils 
from Arisaig, Nova Scotia, H. Piers. 
Trans, of theN. Y. Acad, of Sciences, Vol. XII, 1892-1893, contains: On 
Recently Discovered Deposits of Diatomaceous Earth in the Adiron- 
dacks, Chas. F. Cox; Additions to the Paleobotany of the Cretaceous 
Formation on Staten Island, A. Hollick; Plant Distribution as a factor 
in the Interpretation of Geological Phenomena, with special reference to 
Long Island and Vicinity, A. Hollick; Preliminary Contribution to our 
knowledge of the Cretaceous Formation on Long Island and Eastward, 
A. Hollick; On an Occurrence of Gabbro (Norite) near Van Artsdalen's 
Quarry, Bucks Co., Pa., J. F. Kemp; On Phosphate Nodules from the 
Cambrian of Southern New Brunswick, W. D. Matthew; On Antenna? 
and other Appendages of Triartlwus Beckii, W. D. Matthew; Rare Faces 
on Pyrite Crystals, from the Kingsbridge Ship Canal, A.J. Moses; Notes 
on the Clays of New York State and their economic Value, H. Ries; A 
Geological Reconnaissance in the Vicinity of Gouverneur, N. Y., C. H. 
Smyth, Jr.; Petrography of the Gneisses of the Town of Gouverneur, 
N. Y., C. H. Smyth, Jr. 
CORRESPONDENCE. 
The Reproduction op Arms in Crinoids. In the cabinet of Dr. 
Welch at Wilmington, Ohio, the son of Dr. L. B. Welch, who furnished 
so many specimens to U. P. James, of Cincinnati, and other paleontol- 
ogists, there is a small crinoid considered by him to be Dendrocrinus 
casii Meek. It is interesting, however, as being one of two specimens 
of this species found by the elder Dr. Welch, illustrating the power of 
crinoids to reproduce their arms. The figure drawn from the original 
