January 21^ 1916] 



SCIENCE 



103 



Biology, Princeton University. 



There is no direct relationship between the 

 extent of muscular activity and the rate of 

 regeneration. In the absence of the influence 

 of the sense-organs regeneration can take place 

 normally but always at a decidedly lower rate. 



15. Heritahle Variations and the Results of 

 Selection in the Fission Rate of Stylonychia 

 Pustulata: Austin Ealph Middleton, Zoo- 

 logical Laboratory, Johns Hopkins Univer- 

 sity. 



It is possible to give precise data as to the 

 occurrence of heritable variations and their 

 accumulation through selection : and this can 

 hardly fail to have influence on the conception 

 of the genotype as a fixed thing. 



16. Hereditary Anchylosis of the Proximal 

 Phalangeal Joints (Symphallangism) : 

 Harvey Gushing, Harvard Medical School 

 and Peter Bent Brigham Hospital, Boston. 

 The character behaves as a simple Mendelian 



dominant with equal chance among the ofF- 

 spring of affected individuals that it will be or 

 will not be inherited. 

 lY. The Relative Stimulating Efficiency of 



Spectral Colors for the Lower Organisms: 



S. O. Mast, Zoological Laboratory, Johns 



Hopkins University. 



The stimulation in all of the organisms 

 studied depends upon the wave-length of the 

 light, and the stimulating efficiency is very 

 much higher in certain regions of the spectrum 

 than in others, but the regions differ in cer- 

 tain organisms closely related in structure. 



18. The Mission Range, Montana: W. M. 

 Davis, Department of Geology, Harvard 

 University. 



This range seems unique in its systematic 

 tripartite arrangement of normally and gla- 

 cially sculptured forms. 



19. Definition of Limit in General Integral 

 Analysis: Eliakim Hastings Moore, De- 

 partment of Mathematics, University of 

 Chicago. 



The definition is noteworthy in that it 

 involves no metric features of the range '}5 

 underlying the range of definition of the func- 

 tion F{(t). 



This number of the Proceedings contains 

 also a notice of the memoir by Charles 0. 

 Adams on " The Variations and Ecological 

 Distribution of the Snails of the Genus lo"; 

 the Eeport of the Autumn Meeting, and the 

 Index and Table of Contents of the complete 

 volume, including a list of the ofiicers and 

 members of the academy. 



We may summarize the articles in Yolume 1 

 of the Proceedings as follows: Mathematics, 

 21; Astronomy, 31; Physics, 7; Chemistry, 21; 

 Geology and Paleontology, including Mineral- 

 ogy and Petrology, 10; Botany, 4 (see also 

 Genetics); Zoology, 15 (see also Genetics); 

 Genetics, 17; Physiology and Pathology, in- 

 cluding Bacteriology, 24; Anthropology, 12; 

 Psychology, 3; a total of 165 articles. 



The division of these articles between mem- 

 bers of the academy and non-members is 55 

 and 110, respectively. 



The list of institutions which have contrib- 

 uted three or more articles is as follows : Car- 

 negie Institution 34, divided as follows : Solar 

 Observatory 17, Nutrition Laboratory 9, Sta- 

 tion for Experimental Evolution 5, Marine 

 Biology 2, Geophysical Laboratory 1; Univer- 

 sity of Chicago 20; University of California 

 17; Harvard University 16; Johns Hopkins 

 University 11; Eockefeller Institute 11; Uni- 

 versity of Illinois 8; Tale University 6; 

 Princeton University 5; Smithsonian Institu- 

 tion 4; U. S. ISTational Museum 4; Stanford 

 University 4; American Museum of Natural 

 History 4; U. S. Geological Survey 3. 



Edwin Bidwell Wilson 



RECENT PROGRESS IN VERTEBRATE 

 PALEONTOLOGY 



Three years ago the Paleontological Society 

 of America published a symposium, the pur- 

 pose of which was to present a review of the 

 progress made during the preceding decade in 

 paleontology. Since 1911 there have been pub- 

 lished in the American Year Book brief sum- 

 maries of the more important results of in- 

 vestigation in this field throughout successive 

 years. The extreme brevity of these reviews 

 has rendered them less useful to students than 



