RADI AT A. 



The radiated animals, usually known under the name of Zoo- 

 phytes, are so called from the peculiar anatomical arrangement of 

 their parts. The mouth is usually central, and the other parts are 

 arranged around it, in a radiated manner. The Star-fish, Sea- 

 nettle, Polypi, &c. are examples of this form, 



ECHINODERMATA. 



Usually of a solid structure, and always having the surface beset 

 with spines or some rough coating. 



EcHfNUS GRANULA'TUS, Sav, Jour7i. .^cad.JYat. Sc.,n. 



This animal, from its size, shape, color, and the spines with 

 which it is armed, may be well compared to a chestnut-burr. It 

 is sometimes called the Sea-chestnut or Sea-egg. 



Scute'lla (Echinara'chnius) PARMA ? RuMPH. A cir- 

 cular, slightly elevated object, apparently composed of sand. It 

 is found from one to three inches in diameter, and has a central 

 star composed of five leaflets, above. The upper surface is di- 

 vided into small hexagonal areas ; and below, it is irregularly 

 veined. When not rubbed, it is found covered with short, deli- 

 cate spines. 



AsTe'riAS (GoNIa'stER) EQUe'stRIS, Lam.; .^n. sans Vert., in. 

 242. Encyc. Mdth., pi. 101, 102. 



A fine specimen was thrown upon Phillips's Beach, and found 

 by Dr. Prescott, after a storm. 



AsTERIAS ARANCi'acA, Lifi.; Encijc. Mith.,i)l.in,f.'3,4. 



A small specimen, was taken from the mouth of a cod-fish. 



