444 Dr. J. E. Gray on new Genera and Species of 
Filigella gracilis. Fig. 2. 
e 
The coral very slender, thread-like; the polype-cells about 
one inch or three-quarters of an inch apart. 
Hab. 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. 
Hab. Australia. 
This specimen was found among some reptiles &c. pur- 
chased from Mr. Higgins, from Australia. 
Mr. Jukes, in1846, presented to the British 
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 Melithea 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 grooved ; Acabaria divaricata. 
internodes short, swollen, spongy. 
