Contents. vii 
Monthly Author's Catalogue of American Geological Litera- 
ture 320 
Correspondence. 
Are the Amygdaloidal melaphyrs of the Boston hasin intrusive 
or contemporaneous ? ]J\ O. Crosby 323 
Personal and Scientific News 327 
National Museum for Canada; Methods of field instruction in 
Geology at Harvard; Neutaconkanut boulder; Bement collec- 
tion of the American Museum of Natural History ; The Spen- 
diaroff Prize. 
JUNE NUMBER. 
The Ontakii) Coast between Fairhavex and Sodus Bay. /. O. 
Martin. [Plates XXVI and XXVH] 331 
The Eighth Session of the International Congress of Geolo- 
gists. Paris, 1901. Pcrsifor Frazcr 335 
Two New Genera and Some New Species of Fossils from the 
Upper Paleozoic Rocks of Missouri. R. R. Rotvlcy. [Plate 
XXVIII] 343 
Ore Formation on the Hypothesis of Concentration Throi'gh 
Surface Decomposition. C. R. Kcycs 355 
Concerning the Occurrence of Gold and some other Mineral 
Products in Iowa. Samuel Cah'iii 363 
Editorial Comment. 
Museum Catalogues 372 
Contributions to the Literature of volcanoes 374 
Gilbert's summary history of Niagara Falls ^7^ 
The Term Pludson River 2>77 
Review of Recent Geological Liter.vture. 
Phylogeny of the Rhinoceroses of Europe. H. F. Osboni, 379; 
Some new and little known fossil vertebrates. /. B. Hatcher, 
379- 
Monthly Author's Catalogue of American Geological Litera- 
ture 380 
Correspondence. 
Are the St. John Phmt Beds Carboniferous? G. F. Mafthczo, 
383 : The structure of Diamond Head. Oahu. JF. H. Ball, 386. 
Personal and Scientific News. 
American Association for the Advancement of Science, 387 ; 
First description of the geysers of the Yellowstone National 
Park. 388: Excursion of Section E, A. A. A. S.. 388; Lehigh 
University, 389; Geological trip from Harvard L'niversity, 390; 
Increased coal mining in Pennsylvania, 390. 
