Alcyonoid Corals in the British Museum. 445 



This differs from all the other genera of Melithaeadse in 

 having a single series of separate well-developed polype-cells 

 on each of the two edges of the branches and branchlets. 



Acaharia divaricata. Fig. 3. 



Coral very slender, fan-like, branched; branches rather 

 elongate, divergent ; bark red-brown ; axis rose-coloured. 

 Hah. Australia. (Jukes, no. 2787.) B.M. 



Anicella. 



Coral fan-like, dichotomously branched ; branches separate, 

 divaricating, in the same plane, arising from the short, rather 

 sunken joints. Bark thin, hard, smooth, longitudinally 

 grooved. Cells minute, subcylindi'ical, short, produced in a 

 nan'ow alternating series on each edge of the branches and 

 branchlets. Axis calcareous, solid, with longitudinal grooves ; 

 intemodes very short, contracted, bark-like. 



This genus differs from Melithcea in the bark being smooth, 

 and the intemodes not swollen, and from Isis in the internodes 

 being bark-like and not cartilaginous. 



Anicella australis. Fig. 4. 



Coral red, growing in one plane ; the stem distinctly jointed ; 

 the branchlets slender, with the joints very inconspicuous. 

 Hah. Port Essington. (Jukes.) B.M. 



