404 Scientific Intelligence. 



pages 721 to 831 of Zittel's Handbuch der Palseontologie, I 

 Abtheilung, Palseozoologie, BD. II, and bears the date of 1885. 



11. On the Higher Devonian Faunas of Ontario Co., AT. IT.; 

 by J. M. Clarke. 80 pp. 8vo, with three plates. Bull. U. S. 

 Geol. Survey, No. 16. Washington, 1885. — Among the fossils 

 from the Genesee shales, are Dinichthys Newberryi Clarke, and 

 Palmoniscus Devonicus Clarke ; from beds above, called Naples 

 beds, Palaioniscus, with a fish spine referred to Pristacanthus. 

 (The Dinichthys is near, though distinct from, the species described 

 by G. N. S. Ringueberg from the Portage Group on Lake Erie). 



The Naples beds include the lower part of the series referred 

 by Hall to the Portage, namely, the Cashaqua shales and Gardeau 

 shales, which, according to Mr. Clarke, belong with the Genesee 

 shales in fauna ; while the rest of the Portage series, the Portage 

 sandstone, he would transfer to the Chemung group. 



Mr. Clarke describes a " Goniatite concretionary layer," as 

 occurring at an elevation of about 150 feet above the top of the 

 transition shales. The rock contains much pyrite, has a thickness 

 of eight inches to a foot, and is overlaid by four feet of soft shales 

 abounding in concretions ; and nowhei-e above the Marcellus shales 

 (of the lower Middle Devonian) are Goniatites so abundant as 

 here. The deposit is compared in its characters and the abund- 

 ance of Goniatites to the Kramenzelkalk or Goniatitenschichten 

 of the Rhine Provinces and Westphalia. Hall's species Goniatites 

 Patersoni, G. discoideus and G. sinuosus are in comparatively 

 great abundance and generally have served as nuclei for the con- 

 cretionary masses. 



A number of new species are described from the beds. After 

 the descriptions follows a list of all the known species of the 

 several divisions of the Genesee, Portage and Chemung groups 

 from Ontario County. 



12. Fossil Ostracoda from Colorado. — Professor T. Rupert 

 Jones has studied the Ostracoda of the Jurassic Atlantosaurus 

 beds, near Canon City, from specimens of the rock sent him by 

 Dr. C. A. White, of the U. S. Geological Survey, and described 

 and figured seven new species in the " Geological Magazine" for 

 April. 



13. The Tripyramid Slides o/1885 (Appalachia, iv, No. 3, 1886), 

 p. 177). — In this paper Mr. A. A. Butler, after describing the 

 effects of the slides in 1885 of Mt. Tripyramid in the White Moun- 

 tains considers the facts that determine the occurrence of slides, 

 and among these mentions as " one of the secondary factors, the 

 preparatory work done by underground streams," in wearing and 

 making channels over the surface of the underlying rocks; and 

 observes that this is often promoted by the laying bare of the 

 rocks for short distances by small or incipient slides. The ques- 

 tion as to where a slide begins, whether at the top or at the bot- 

 tom, he answers by saying, with sustaining reasons, at neither, 

 but at some distance above the bottom. The Tripyramidal 

 slide occurred on an average slope of about thirty-four degrees. 



