220 CLASS IIL— ORDER IL 



rind thick and corky, of a reddish brown approach- 

 ing to black ; axe compressed at the articulations ; 

 height from two to three decimetres. 

 American seas. 



SOFT. 



4. EuNiCEA mollis. Cylindrical and dichotomous ; 

 branches flexuous and intermixed ; rind spongy and 

 blackish ; height from three to four decimetres. 



Mediterranean. 



AMBER. • 



5. EuNiCEA succinea. Branches dichotomous; 

 papillae prominent and very open ; axe transparent, 

 and of a colour resembling yellow amber. 



Nota. The three preceding species have so much 

 resemblance to each other, that they may be merely 

 varieties of the same species. 



PSEUDO-ANTIPATHES. 



6. EuNiCEA pseudo-antipathes. Branching and di- 

 chotomous ; papillae broad at the base, and trun- 

 cated at the summit ; rind very thick, not adhering 

 strongly to the axe, which is always compressed at 

 the bifurcations ; height from two to three decimetres. 



American seas. 



CLUBBED. 



7. EuNiCEA clavaria. Branches cylindrical, in the 

 form of clubs, and very few ; papillae with a large open- 

 ing, but varying in their length ; rind blackish ; axe 

 diminishing greatly by desiccation, and appearing 

 compressed ; height two decimetres ; diameter of the 



