254 ANIMALS OF THE SEASHORE 



Perophora viridis Verrill 



Simple tunicates, about % inch long, but con- 

 nected at the base by a common creeping stem; 

 greenish in color. Covers piling, sea weed, etc. in 

 shallow water from Vineyard Sound to Bermuda. 

 Often found in New Jersey's inland waterways. The 

 pulsation of the heart is easily noted under a low 

 powered microscope. 



Compound Ascidians 

 Botryllus schlosseri Pallas 



Fig. 45 



A colonial form that occurs as fleshy masses 

 attached to algae, eel grass, etc. The individuals 

 of the colony (zooids) form elliptical or stellate pat- 

 terns with as many as ten individuals in a design. 

 The whole colony is embedded in a common gelatin- 

 ous tunic. The color of the zooids is variable but 

 usually some bright shade of purple. 



Known from New Jersey northward; often com- 

 pletely covers a group of Molgvla. 



Amaroucium pellucidum Leidy 



PLATE XXVIII. Fig. 1 



A colonial tunicate which forms large gelatin- 

 ous masses as much as 6 inches in diameter; often 

 coated with sand grains. The individual zooids are 

 elongate and are arranged in tightly crowded stalked 



