350 Scientific Intelligence. 



melted from the southern slope of the hill as to allow the stream 

 to flow down this slope to the lowlands beyond. 



Previous to the beginning of my work Prof. Shaler liad noted a 

 similar channel on Forbes Hill in Milton, Mass., and to which he 

 had ascribed a nearly similar origin. 



4. Trias and Jura of Shasta County, California / abstract of 

 a paper read before the Geological Society of America, Aug. 15, 

 1894, by James Perrust Smith. — The columnar section of the 

 metamorphic series of the Klamath mountains is given in the 

 paper; this is made up of strata from Devonian to Jurassic age. 



The presence of Middle Trias is shown by fossils. This is over- 

 lain comformably by slates and limestones with a rich fauna of 

 Upper Triassic age, directly comparable to that of the zone of 

 Tropites subbullatus and Trachyceras aon of the Karnic in the 

 Tyrolean Alps. This fauna is shown by its affinities to Himalayan 

 and Tyrolean species to belong to a prolongation of the fauna of 

 the Mediterranean and Indian Triassic provinces, and not to the 

 Arctic-Pacific province. The occurrence of Jurassic fossils is 

 mentioned, and new localities given. 



The widespread Jura-Cretaceous unconformity in the Coast 

 Range, Klamath mountains, and Sierra Nevada, is considered a 

 proof that these three ranges belong to one great mountain sys- 

 tem, in which the disturbances were closely associated. 



5. The Carboniferous Strata of Shasta County, California / 

 abstract of a paper read before the A. A. A. Sci., Aug. 1894, by 

 James Perrin Smith. — The general structure of a portion of the 

 Klamath mountains was briefly discussed, and the systems of 

 faults and folds indicated. 



The oldest strata of the region are of Devonian age, overlain 

 by the Bah*d shales which belong to the Lower Carboniferous. 

 The latter have a fauna analogous to that of the Eureka district 

 of Nevada, and thus have many Devonian species commingled 

 with the Carboniferous. Faunally these are thought to be homo- 

 taxial with the Waverly, but stratigraphically they belong higher 

 in the section. 



Above the Baird shales lie about 2000 feet of limestone with a 

 carboniferous fauna, probably equivalent to the Coal measures. 

 Above this limestone lie calcareous shales with a fauna equivalent 

 to that of the Robinson beds, Plumas County, and thus probably 

 Permo-Carboniferous in age. 



6. Some anomalies in the growth of Alum Crystals. — Mr. 

 H. A. Miers read a paper before the British Association on a 

 new method of measuring crystals, containing the following 

 interesting facts : 



The two fundamental laws of crystallography — namely, (1) the 

 constancy of the angle in crystals of the same substance, and 

 (2) the law of simple rational indices seem to be violated by 

 those crystals which are liable to irregular variations in their 

 angles, or those which have the simple faces replaced by compli- 

 cated " vicinal " planes. Both these anomalies are exhibited by 



