192 Scientific Serials. [ March. 
gards as Laurentian, and the other as eruptive, and subsequent to the 
deposition of the Potsdam, at least, as that rock contains no fragments of 
it, though full of pebbles from the Huronian. 
E. Hagen vice-presidents. Dr. Ward delivered an address on the Pet- 
rified Forest of California. He considered the peculiar fracture of the 
fallen petrified trunks their most suggestive and important peculiarity 
since they are broken up somewhat symmetrically in a manner that 
might happen to wood rendered brittle by charring or perhaps by partial 
petrifaction, but could hardly be conceived as occurring to ordinary wood 
or stone. 
T 
SCIENTIFIC SERIALS.! .- 
QUARTERLY JOURNAL OF MICROSCOPICAL Scrence.— January. On 
the Structure of Hyaline Cartilage, by G. Thin. Further Observations 
on a Peach or Red Colored Bacterium, by E. R. Lankester. On the 
Development of Teeth, by C. S. Tomes. An Account of Professor 
Haeckel’s Recent Additions to the Gastrea Theory, by E. R. Lankester. 
On the Evolution of Hemoglobin, by H. C. Sorby. 
THe Montaty Microscoricat JOURNAL. — January. Improved 
Method of Applying the Micro-Spectroscopic Test for Blood-Stains, by 
J. G. Richardson. 
THe POPULAR SCIENCE: Review. — January. In the Wake of the 
Challenger, by J. G. Galton. The Cretaceous Flora, by J. Morris. 
THE GEOLOGICAL MAGAZINE. — January. Contributions to the 
Study of Volcanoes, by J. W. Judd. Geology of Ice and Bell Sounds, 
Spitzbergen, by A. E. Nordenskiöld. 
ZEITSCHRIFT FÜR WISSENSCHAFTLICH ZoöLOGIE. — December 8, 
1875. Natural History of the Marine Bryozoa, by W. Repiachoff. 
Anatomy of Chetoderma nitidulum, by L. Graff. On the Order Gastro- 
tricha, by H. Ludwig. 
ARCHIV FÜR MIKROSKOPISCHE ANATOMIE.— November 20, 1875. 
On the Tegument of Amphibia, by F. Leydig. On the Anatomy of 
Amphioxus lanceolatus, by P, Langerhans. 
ARCHIVES DE ZOÖLOGIE EXPÉRIMENTALE ET GÉNÉRALE. — No. 3, 
1875. Researches on the Free Helminths of the Coast of Brittany, by 
A. Villot. Contributions to a History of the Gregarine of Invertebrates 
of Paris and Roscoff, by A. Schneider. On the Development of Podur®, 
by Oulganin (notice by the editor). 
PETERMANN’S GEOGRAPHISCHER MīTTHEILUNGEN. — November 10, 
1875. Stanley’s Exploration of Victoria Nyanza, by E. Behm. Nor- 
denskiöld’s New Route by Sea from Europe to Siberia. | 
1 The articles enumerated under this head will be for the most part selected. 
