384 Scientifie Serials. [June. 
and Physical Structure of the Black Hills, by Henry Newton; The Age 
of Mountains as determined by Degradation, by J. W. Powell. 
Five members were elected, namely, Professors Langley, Peters, and 
Haldeman, General Warren, and Mr. Clarence King. 
SCIENTIFIC SERIALS. 
Tue ANNALS AND MAGAZINE or NATURAL History.— April. Is 
there such a Thing as Hozodn Canadense? a Micro-Geological Investi- 
gation, by Otto Hahn. Descriptions of some New Species of Annelida 
from Kerguelen’s Island, by W. C. McIntosh. Extinct Lemurina, by 
W. H. Flower. Note on the Embryogeny of Salmacina Dysteri, by A. 
Giard. : 
ARCHIVES DE ZOÖLOGIE EXPÉRIMENTALE ET GÉNÉRALE. — No. 
4, 1875. Contributions à l'Histoire des Grégarines des Invertébres 
de Paris et de Roscoff, par A. Schneider. Recherches sur l Appareil 
Circulatoire des Oursins [ Echinus], par E. Perrier. 
ZEITSCHRIFT FUR WISSENSCHAFTLICHE ZodLoGIE (Siebold und 
Kölliker). — March 6. Researches on Free-Living Nematodes, and the 
Genus Chetonotus, by O. Bütschli. On the Ontogony of Cyclas, and 
the Homology of the Germ-Layers in the Mollusks, by H. von Ohering.- 
On the Silk-Glands of Lepidoptera, by F. E. Helm. On the Formation 
of the Blastoderm in the Spiders, by H. Ludwig. On the Challenger 
Expedition. Letter to Professor Siebold, by R. V. Willemoes-Suhm. 
PererMann’s MITTHEILUNGEN. — January 21st. The Ground 
Work of the Map of the Loango Coast, by P. Giissfeldt. The Geo- 
graphical Convention in Paris, July 15 till September 16, 1875. The 
Southern Batta-Land of Sumatra, by A. Schreiber. Geographical Ne- 
crology of the year 1875. Journey to Araguay, by Dr. Couto de Magal- 
hăes, in January, 1865. March Ist. The Distribution of Sedimentary 
Rocks in Europe, by H. Habenicht. River Navigation in Southern New 
Guinea. Views from the High North, by Karl Weyprecht. The Mon- 
gols and the Land of the Tanguts. Przewalsky’s Journey. 
MONTHLY MICROSCOPICAL JOURNAL. — April. On a New Arrange- 
ment for Illuminating and Centring with High Powers, by W. H. Dal- 
linger. The Identification of Liquid Carbonic Acid in Mineral Cavities, 
by W. N. Hartley. On some Structures in Obsidian, Perlite, and 
Leucite, by F. Rutley. On the Aperture of Object-Glasses, by Fin. 
Wenham. On Zeiss’ „4 Immersion, by W. J. Hickie. 
BULLETIN or THE Museum or Comparative ZoöLoGY.— Hl., Nos. 
11-14. Exploration of Lake Titicaca, by A. Agassiz and S. W. Garman. 
. Fishes and Reptiles, by S. W. Garman. Notice of the Paleozoic 
Fossils, by O. A. Derby, with Notes by A. Agassiz. Recent Co 
from Tilibiche, Peru, by A. Agassiz and L. F. Pourtales. ‘The Devel- 
opment of Salpa, by W. K. Brooks. 
1 The articles enumerated under this head will be for the most part selected. 
