444 Dr. J. E. Gray on new Genera and Species of 

 Filigella gracilis. Fig. 2. 



The coral very slender, thread-like ; the polype-cells about 

 one inch or three-quarters of an inch apart. 

 Hah. Coast of Brazil and Cape Frio. B.M. 



Cirrhipathes filiformis. 



Coral very slender, thread-like, of equal diameter from end 

 to end, pale brown, with crowded spinules on the surface ; 

 the spinules are conical, nearly transparent, and spread out 

 nearly horizontally from the axis. 



Hah. Australia. 



This specimen was found among some reptiles &c. pur- 

 chased from Mr. Higgins, from Australia. 



Mr. Jukes, in 1846, presented to the British Fig. 3. 

 Museum some corals that were collected by 

 him on the north coast of Australia : among 

 others, there are two very interesting new 

 genera allied to Melithoia and Isis. They 

 differ from all the other genera of the group 

 in only having a single series of polype-cells 

 on each of the two edges of the branches 

 and branchlets. 



ACABARIA. 



The coral very slender, branched, dichoto- 

 mous, expanded in a plane ; branches and 

 branchlets very slender, compressed, with 

 short, swollen joints, more prominent on the 

 older stems. Bark thin, hard, smooth. Cells 

 short, broad, subcylindrical, truncated, in a 

 single series on each edge of the branches and 

 branchlets, rather close together. Axis cal- 

 careous, solid, red, longitudinally ^xooY^di ] Acaharia divaricata. 

 internodes short, swollen, spongy. 



