1)4 ANIMALS OF THE SEASHORE 



Echinocardium cor datum Pennant (Heart Urchin) 



PLATE VIII. Fig. 7, 8 



Heart shaped test covered with fine spines. 

 This species burrows dee]) in the mud and is seldom 

 seen alive. When they die the empty tests often fill 

 with gas and rise through the mud to the floor of the 

 sea; sometimes after storms they are washed upon 

 the beach. It reaches a size of about 4 inches in 

 diameter. 



Not seen alive in New Jersey although empty 

 tests have been found at a number of places off the 

 coast near Cape May. Almost cosmopolitan in distri- 

 bution. 



Brisaster fragilis Diiben & Koren (Heart Urchin) 



PLATE VIII. Fig. 6, 9 



Very young individuals of this species (% inch 

 in diameter) were dredged at McCrie Shoal, 7 miles 

 off Cape May, in 21 feef of water (August 28, 1928). 

 This species is known from the Gulf of St. Lawrence 

 and the Bay of Fundy southward to Florida. It also 

 occurs in northwestern Europe and at the Cape of 

 Good Hope. 



HOLOTHUROIDEA 



(Sea Cucumbers) 



Although externally totally different from star- 

 fish, the Sea Cucumbers have most of the external 



