THE EMBRYCLOGY OF STO.'.iOTCCA APICATA. 



INTRODUCTION. 



The material for this research was secured, and the 

 observations on the living forn^s were made, during the sum- 

 mers of 1903 and It 04 while I was occupying a table at the 

 United States Fisheries Laboratory at Beaufort, i.orth Caro- 

 lina. Sto^otoca is not very abundant in the harbor at Beau- 

 fort, I found it, there as early as the -riddle of June. It 

 is niost Plentiful during July and early in August. A few 

 specimens may also be taken until early in September, The 

 eggs were obtained from medusae captured between July 10 

 and August 5. The adult a- imals rould not be secured in 

 large numbers; and, owing to the fact that each female lays 

 only a few eggs the material for embryological study was 

 limited. Therefore the greater part of the worlc the resuitc 

 of which are embodied in tis paper was done with living 

 material. All the drawings, with the excention of those 

 of sections were -ade from camera sketches of the living 



