858 



SCIENCE. 



[N. S. Vol. XXI. No. 544. 



pendently of the segmental arteries, with 

 which, however, they join later. The illus- 

 trations which Mr. Sabin gives of the actual 

 condition of the developing subclavian ar- 

 teries were very much to be desired, since 

 Hochstetter 's paper was illustrated only 

 by a few simple diagrams. The results are 

 now published in the Anatomischer An- 

 zeiger, Vol. 26, Nos. 11 and 12, with 29 

 illustrations. 



The following demonstrations were made 

 before the society: 



1. William A. Locy, Northwestern Uni- 

 versity, 'Dissections Showing the Nervus 

 Terminalis in Scyllmm, Trygon and other 

 Selachians. ' 



2. William S. Miller, University of Wis- 

 consin, 'Demonstration of the Lymphatics 

 of the Lung and Stomach in Necturus.' 



3. Bennet M. Allen, University of Wis- 

 consin, 'Models showing the Origin of the 

 Sex-cords and Rete-cords in Chrysemys.' 



Frank R. Lillie, 



Secretary. 



SCIENTIFIC JOURNALS AND ARTICLES. 

 The April-May number of The Journal of 

 Geology contains an article on ' The Zuni 

 Salt Lake ' of western New Mexico, by Mr. N. 

 H. Darton. It is illustrated by two maps and 

 three half-tones. Mr. Douglass W. Johnson 

 reviews ' The Tertiary History of the Tennes- 

 see River ' and concludes that it has followed 

 its present course through Walden Ridge for 

 a long time, ' probably since the close of the 

 Cretaceous period at least.' This article is 

 illustrated by nine figures. Professor B. 

 Shimek contributes an ' Additional Note on 

 Helicina occulata,' a recent species, which 

 also occurs as a fossil in the loess, and con- 

 cludes that it supports the view that ' during 

 the deposition of the fossiliferous loess the 

 climate was not glacial.' Mr. Rollin T. 

 Chamber! in describes ' The Glacial Features 

 of the St. Croix Dalles Region,' which is il- 

 lustrated by three sketch maps. Professor 

 Stuart Weller describes ' A Fossil Starfish 



from the Cretaceous of Wyoming,' which he 

 names Pentagonaster hroumi. Mr. O. W. 

 Willcox contributes an article on ' The So- 

 called Alkali Spots of the Younger Drift- 

 sheets,' which are patches of white efflores- 

 cence which ' consist of small amoimts of 

 sodium chloride and much larger amounts of 

 the carbonates and sulphates of magnesium 

 and calcium.' Mr. George C. Matson has a 

 paper on the ' Peridotite Dikes near Ithaca, 

 N. Y.,' in which he describes several new 

 dikes in addition to those noted over sixty 

 years ago by Vanuxem and much more re- 

 cently by Professor Kemp, and Mr. Wallace 

 W. Atwood describes the ' Glaciation of San 

 Francisco Mountain, Arizona.' This article 

 is illustrated by a sketch map of the top of 

 the mountain and it is stated that these rec- 

 ords * may possibly be those of the southern- 

 most ice which existed in this country during 

 the Pleistocene period.' 



To the American Geologist for April Pro- 

 fessor Eugene A. Smith contributes a ' Bio- 

 graphical Sketch of Henry McCalley ' with 

 portrait. Professor Warren Upham has an 

 article on ' The Nebular and Planetesimal 

 Theories of the Earth's Origin,' in which he 

 quotes at length from Dr. T. C. Chamberlin's 

 recent paper on the planetesimal hypothesis. 

 Professor Upham also quotes from Dr. G. K. 

 Gilbert's paper on ' The Moon's Face ' and 

 concludes that his explanation of the origin 

 of the very abundant small and large crateri- 

 form features of the moon seems largely iden- 

 tical with Chamberlin's hypothesis ' so far as 

 that hypothesis deals with the segregation of 

 the originally nebulous matter to form planets 

 and satellites.' Professor J. W. Spencer re- 

 views ' Dr. Nansen's Bathymetrical Features 

 of the North Polar Sea, with a Discussion of 

 the Continental Shelves and the Previous 

 Oscillations of the Shore Line.' Mr. Spencer 

 says that while this memoir ' treats of the 

 physiographic features of the Polar basin, yet 

 the greater part is devoted to the investigation 

 of continental shelves, not merely of the 

 Arctic basin, but also those of the Atlantic, 

 in which respect it is the most important 

 work that has appeared anywhere. ' Professor 



