FIG. i. A male (right) and female (left) 

 E. Pallasii in a normal state of con- 

 traction in sea-water, x %. Photo- 

 graphed from life. 



FIG. 2. The same pair in the same po- 

 sition, but with the female contracted 

 under irritation, x %. Photographed 

 from life 



FIG. 3. Ventral view of pro- 

 boscis and anterior body. 

 Photographed from pre- 

 served Alaskan specimen. 

 Life size. 



FIG. 4. Anal rows of 

 setae. Photographed 

 from preserved speci- 

 men. Life size. 



FIG. 5. Thnlassema. erythrogr.m:- 

 mon. Photographed from pre- 

 served specimen. % actual size. 



