12 



87. Clathraria acuta. B.M. 



Coral-branches tapering ; branchlets acute. 

 Hab. ? 



Fam. 8. TRINELLADJE. 



Coral much branched, expanded, fan-like, on a plane. Bark thin, 

 with a very large number of small slender spicules. Bark and 

 polypes with rough minute diverging spicules. Polype-cells on all 

 sides of the branchlets, and scattered over the branches ; prominent, 

 broad, and depressed or elongate, and cylindrical. Axis calca- 

 reous. Joints hard, solid, longitudinally striated, with indistinct, 

 slightly contracted articulations, which are cork-like and pierced 

 with a number of tubular canals when deposited, but are soon 

 covered with a white, hard, solid coat like the joints ; branches from 

 the short stony joints. 



34. TRINELLA. 



Coral branched, fan -like; branches furcate; branchlets subpin- 

 nate, diverging ; terminal branchlets with a series of conical pro- 

 jections on each of the two edges, the last joint compressed, three- 

 lobed. The bark thin. Polype-cells on the terminal branchlets in 

 two lateral series, alternating with the central marginal projections, 

 scattered on the branches and main stem. Cells circular ; margin 

 slightly raised, covered with radiating spicules and a central de- 

 pression. Axis white, solid, hard, calcareous, with very indistinctly 

 marked, slightly contracted, short internodes ; internodes hard, with 

 small tubular canals. 



88. Trinella Swinhoei. B.M. 



Hob. Formosa (Swinhoe). 



Fig. 4. 



Trinella Swinhoei. 



