O V-^ 1 Hr IN \^ tl 



Editorial Committee : S. Newcomb, Mathematics ; R. S. Woodward, Mechanics ; E. C. Pickeeino, 



Astronomy ; T. C. Mendenhall, Physics ; R. H. Thurston, Engineering ; Iea Remsen, Chemistry ; _ 



Joseph Le Conte, Geology ; "W. M. Davis, Physiography ; Henry F. Osboen, Paleontology ; 



W. K. Brooks, C. Hart Meeeiam, Zoology ; S. H. Souddee, Entomology ; C. E. Bessey, 



N. L. Beitton, Botany ; C. S. Minot, Embryology, Histology ; H. P. Bowditch, 



Physiology ; J. S. Billings, Hygiene ; William H. Welch, Pathology ; 



J. MoKeen Cattell, Psychology ; J. W. Powell, Anthropology. 



Friday, December 21, 1900. 



CONTENTS: 



The Mammalian Fauna of the Santa Cruz Beds of 

 Patagonia: PROFESSOR W. B. ScOTT 937 



7s there any Distinction between Sexual Reproduction 

 and Asexual Reproduction? Dr. Winteeton 

 0. Curtis 940 



Siudj of the Correlation of the Human Skull : Alice 

 Lee 946 



American Ornithologists' Union: John H. Sags... 949 



Tlte Welshach Light 951 



University Registration Statistics : Dr. Geo. B. 

 Gbrmann 956 



Scientific Books : — 



Mcllvaine's One Thousand American Fungi; 

 Lankester's Treatise on Zoology: J. P. McM. 

 Seurat on Parasitic Hymenoptera ; Miall and 

 Hammond on the Harlequin Fly : De. L. O. 

 HO'WAED. Tlie American Society of Mechanical 

 Engineers: Professor E. H. Thurston 958 



Societies and Academies : — 



The Biological Society of Washington : F. A. 

 Lucas 965 



The Royal Society 966 



The Hartman Anthropological and Archeological 

 Collection.. 967 



The Growth of Cities 968 



Harben Lectures on the Plague 969 



Scientific Notes and News 969 



d Educational News 976 



MSS. intended for publication and books, etc., intended 

 for review should be sent to the responsible editor. Pro- 

 fessor J. McKeen Cattell, Garrison-on-Hudson, N. Y. 



THE MAMMALIAN FAUNA OF THE SANTA 

 CRUZ BEDS OF PATAGONIA.* 



The magnificent collections of vertebrate 

 fossils brought back from Patagonia by 

 Messrs. Hatcher and Peterson are still very 

 largely in the rough state. The work of 

 cleaning and preparing the specimens is 

 proceeding steadily and satisfactorily, but 

 is necessarily slow, and the preparation of 

 a single skeleton may require the labor of 

 many weeks. Enough has been already 

 accomplished, however, to exhibit the char- 

 acter of this very remarkable fauna in its 

 main outlines and to permit a general state- 

 ment of its most salient features. Long 

 and patient study will still be necessary 

 before the full significance of this peculiar 

 assemblage of mammals can be made ap- 

 parent. 



The geological age of the Santa Cruz 

 beds has long been a matter of dispute, be- 

 cause the lack of fossils common to that 

 formation and the standard horizons of the 

 northern hemisphere has prevented any 

 direct comparison. Ameghino, to whose 

 indomitable energy so much of our knowl- 

 edge of Patagonian fossils is due, has al- 

 ways maintained the lower Eocene age of the 

 Santa Cruz beds. On the other hand, Eu- 

 ropean and American paleontologists have 

 been convinced, from the grade of evolu- 

 tion attained by the Santa Cruz mammals, 



* Abstract of a paper read before the Princeton 

 Biological Club, November 16, 1900. 



