104 



SYSTEMATIC ZOOLOGY 



strikingly bilateral. In size they vary from minute individuals 

 only a centimeter in length to the gigantic specimens a meter 

 long and twenty centimeters thick which have been found in 

 the Pacific off the Samoan and the Philippine islands and the 

 coast of California. One species, which is particularly abundant 

 in the Pacific, is commonly called trepang, and is a favorite 

 article of food with the Chinese. 



Fig. 95. Caudina arenata, a sea cucumber common on parts of the New England coast. 



(Drawn from a preserved specimen.) 



