COELENTERATA 45 



tentacles above which there is a conical shaped 

 structure known as the proboscis bearing the mouth ; 

 the proboscis is occasionally saucer-shaped; color 

 usually reddish brown. 



Reproductive polyps (gonosomes) in clusters 

 on main stalk and branches; mature medusae (jelly- 

 fish ) break off and become free swimming. 



The hydroid is frequently found attached to 

 woodwork from Cape Cod southward. 



For medusa of this species see page 54. 



Eudendrium ramosum Linne 



PLATE III. Fig. 9 



Much branched ; up to six inches in height ; main 

 stem fascicled (compound, apparently made up of a 

 bundle of stems); annulations (rings) at base of 

 branches only; in many respects resembles Bougain- 

 villia, but distinguished from it by its more trumpet- 

 shaped proboscis. 



Tw t o types of reproductive polyps (gonosomes) ; 

 male polyps red and usually found in clusters below 

 the nutritive polyp; female ones orange and pyri- 

 form; does not produce free medusae. 



Labrador to North Carolina. 



Pennaria tiarella McCrady 



Much branched; about six inches in height; 

 stems dark brown or black with conspicuous annula- 

 tions. The hydranths are pink; proboscis elongate; 



