CONTENTS. 



The Development of Crangon vulgaris. Third paper with 



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



New Phosphorescent Organs in Porichthys, by Frederick C. 



Test, . . ...... 43 



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

 vester Baxter, . . . . . . .53 



Geological and Mineralogical 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 ; fine arts, 165 ; treasurer's report, 167 ; members de- 

 ceased, 168. 



