CONTENTS. 



The Development of Crangon vulgaris. Third paper with 



plates I, II, III, by J. S. Kingsley, .... 1 



New Phosphorescent Organs iu Porichthys, by Frederick C. 



Test, . . ...... 43 



Berlin: a study of Municipal Government in Gerraany, by Syl- 

 vester Baxter, j^. ...... 53 



Geological and Mlneralogical Notes, No 1. Sodalite, by John 



H. Sears, ....... 88 



On the age of the Andean Medal (with plate), by Samuel Gar- 



man, ........ 95 



New Invertebrata from the Coast of California, by J. Walter 



Fewkes, ........ 99 



Annual Meeting, Monday, May 20, 1889, 147 



Remarks of the President, 147 ; officers elected, 148 ; retro- 

 spect of the year, 149 ; meetings, 149 ; library, 150 ; museum, 

 164; üne arts, 165; treasurer's report, 167; members de- 

 ceased, 168. 



