404 Scientific Intelligence. 



the most recent. From the Bridger Fauna it differs in the 

 absence of Dinocerata and Tiliodonts. The authors describe 

 several new species of fossil Mammals from the Uinta beds, and 

 illustrate them by a number of plates of excellent figures. 



6. On the Lower Carboniferous limestone series in Central 

 Texas ; by R. S. Tare. — Mr. Tarr, in a recent communication 

 to the editors, gives an account of his study of a Paleozoic 

 region in Central Texas which was reported upon by Dr. F. 

 Roemer in 1848 as affording fossils like those of the Carbonifer- 

 ous limestones of the Mississippi Valley. The fossils described 

 were from San Saba County. Mr. Tarr reports that the Paleo- 

 zoic area covers part of Llano, Mason, Southern San Saba and 

 McCulloch Counties. The older rocks in it are much upturned 

 and flexed ; and the Silurian limestones are chiefly marble, and 

 have lost most of their fossils by metamorphism. Carboniferous 

 limestones and shales overlie these beds unconformably, and the 

 Upper Carboniferous consisting of sandstones, shales, clays and 

 limestone, " attain a thickness in one section of 8,000 feet." 



7. The Geographic Development of Northern New Jersey, 

 by Wi. M. Davis and J. Walter Wood, Jr. (Proc. Boston 

 Soc. N. Hist., 60 pp. 8vo. 1889.) — This paper is a valuable 

 study in the subject of the development of drainage channels 

 and areas and of topographic features. 



8. The Intrusive and Extrusive Trap sheets of the Connecti- 

 cut Valley ; by Wm. M. Davis and C. L. Whittle. (Bull. 

 Mus. Comp. Zool., xvi, No. 6, Dec, 1889). — The authors here 

 treat of the means of distinguishing Intrusions and Extrusions, 

 and their general features in Connecticut, and describe in detail 

 some of the more important localities. To those who have read 

 the paper of E. O. Hovey in the number of this Journal for last 

 November (a month earlier in time of publication) and desire the 

 most recent views of Prof. Davis on the general question and 

 help as to methods of further investigation, this paper will have 

 special interest. 



9. Underground Water in the Western Districts . of New 

 South Wales ; by H. C. Russell, F.R.S. — With reference to 

 the remarkable supply of underground water in the interior of 

 Australia, Mr. Russell states that Darling River, one of the largest 

 of the rivers, whose drainage-area receives 22 '14 inches of rain 

 (mean result of ten years) discharges only 1^ per cent of the 

 amount. This remarkably small proportion is due to the porous 

 character of the rocks, through which the water becomes subter- 

 ranean. Lake George, a lake 5x16 miles in area at high water, 

 situated in a depression in the mountains about 2200 feet above 

 mean tide-level, receives by drainage from the hills around but 

 2 to 3*64 per cent of the rain-fall. The great porosity of the 

 rocks is here again demonstrated. — Journ. Proc. R. Soc. N. S. 



Wales, xxiii, 57, 1889. 



10. Genesis and Chemical Composition of the Italian Volcanic 

 soils/ by Dr. Leonardo Ricciardi, Prof. Chim. Accad. Agricolt. 



