Hil. 
VIII. 
CONTENTS. 
Page 
~ The Germinal Spot in Echinoderm Eggs. By H. E. Jordan........... I-12 
. Spermatogenesis of Aplopus mayeri. By H. E. Jordan................. 13-36 
The Relation of the Nucleolus to the Chromosomes in the Primary Oocyte 
Ot Asterias torpesia’ By H.-E. Jordatsc:!.ds0:.2hs bceneedeosdane 37-72 
. The Pelagic Tunicata of the Gulf Stream. By W. K. Brooks.......... 73-04 
Part II. Salpa Floridana (Apstein). 
Part III. The Subgenus Cyclosalpa. 
Part IV. On Oikopleura tortugensis, n. sp. A new Appendicularian 
from the Tortugas, with notes on its embryology. 
. The Origin of the Lung of Ampullaria. By W. K. Brooks and Bartjis 
MeGionee ss tao y a6: o. 1: cp ey Bato bee cio ne Sit ee a ae 95-104 
. The Annual Breeding-Swarm of the Atlantic Palolo. By Alfred G. 
Taye ties atcteretetere-cictic sale teterets siareinys erauats ine stonse asc ncepetieaieis ales oie lsts.s 105-112 
. Rhythmical Pulsation in Scyphomeduse. By Alfred G. Mayer........ 113-131 
Notes on Medusz of the Western Atlantic. By H. F. Perkins........ 133-156 
. Helminth Fauna of the Dry Tortugas. By Edwin Linton.............. 157-190 
. A Variety of Anisonema vitrea. By C. H. Edmondson................ IQI 
