30 



THE EMBRYOLOGY 0? TUPRITOPSIS I'UTRICULA, 



INTRODUCTION. 



This v/orl: on the enbryolopy of Turrjito^sin nutricnla 

 ',vas bPguT! at the suggestior of Profonr.or Brooks. The rate- 

 rial vms collected and the observations on the livinp; s-^eci- 

 mens v/ere made durinfT the surTi-^ers of 1903 and 1904, v/hlle 

 I occ'.iT)ied a table at the United States Fisheries Laboratory 

 at Beaufort, h'orth Carolina, TurritoT>sis is one of the -^ost 

 common TDedusse in the harbor during the sunder. In the two 

 years that I v/as there they became abundant in the begin- 

 ni'-g of JuJ-y and rsTained -or? or less Plentiful until I 

 left Beaufort Se-!^tenber 13. "Ahile the medusao could be col- 

 lected in fairly large nu'^bers, many of them were irr-aturey 

 "^hey lay only a lini.ted ^umber of eg.crs. However the 'material 

 wan r)reserved and sectioned for the study of such facts as 

 could not be made out froT the living fcrrs. The w^rk v/as 

 finished in the Biological Laboratory of the Johns Hopkins 



