G. ANTIPATHES. 191 



CORTICATED. 



2. Antipathes corticata. Stem but slightly branch- 

 ing; branches simple, tortuous, spiny, covered with a 

 thin rind that has neither pores nor cells ; height about 

 four decimetres. 



Indian Ocean. 



TRIANGULAR. 



3. Antipathes iriqnetra. Stem triangular. 

 Indian Ocean. 



DICHOTOMOUS. 



4. Antipathes dichotoma. Stem upright, very 

 long, and dichotomous. 



Mediterranean. 



WOODY. 



5. Antipathes boscii. Stem flexible and branch- 

 ing ; branches div^erging ; extremities setaceous ; co- 

 lour a deep brown ; height a decimetre. — Plate 14. 

 fig. 5. 



North America. 



FOX-TAIL. 



(J. Antipathes alopecuro'ides. Stem branching ; 

 branches in a close panicle, shaggy, and setaceous. 



PYRAMIDAL. 



7. Antipathes pyramidata. Stem tuberculous 

 below, and branching ; branches numerous, springing 

 from the sides, dichotomous, shorter at the top than 

 in the lower part, and forming an echinated pyramid ; 

 height about two decimetres. 



Indian Ocean. 



