46 



ANIMALS OF THE SEASHORE 



two rows of tentacles, one at basal portion of pro- 

 boscis, the other on the upper part of the proboscis. 

 Reproductive polyps attached to the hydranth 

 body just above the lower band of tentacles; the 



Fig. 2 

 Pennaria tiarella McGrady 



medusae thus formed sometimes remain attached 

 to the stalk; other times they become free swimming', 

 although always very minute (1.5 mm. by 0.8 mm.). 



This hydroid is abundant at Woods Hole, Massa- 

 chusetts, and is known as far south as Florida In 

 New Jersey it lives off shore and the dead stems are 

 occasionally washed up on the beach. 



Because of their small size the medusae have 

 not been observed in New Jersey. 



Campanularian Hydroids 



Hydroids with hydranths at the end of stalks 

 and protected by a bell-shaped cup (hydrotheca). 



