624 



end of the terminal branches it is pinkish to white. Two kinds of 

 spicules; eight radiate and cruciform. The eight radiate kind is about 

 0,05 mm in length and very numerous, while the cruciform kind is 

 a little smaller in size and fewer in number. 



Axis is finely striated and is normally dark red in colour with 

 white centre, which is often found near the front side of the axis from 

 the uneven growth of the calcarious substance around the colourless 

 primary axis. There is a small pit in the axis underneath each 

 polyp. 



On the front side of the branches we find always some burrows. 

 The burrow is open at three or four places and serves as a lodging 

 place for a polychaetus worm. The burrow is about 9 mm in length 

 and the diameter of its openings 1 — 2 mm. 



About 300 mm in height and breadth, thick portion of the axis 

 about 20 mm in diameter. 



This species is closely allied to C. stylasteroides Ridley from 

 Mauritius, but differs from it in colour, distribution of polyps, etc. 



Known under the name of ,,aka-sango " and is the most abundant 

 kind of the Japanese corals. 



Corallium böshüensis n. sp. 



Finely branched in one plane, main branches laterally compressed. 

 Polyps prominent, cylindrical. Coenenchym thin, light yellow in 

 colour. Five kinds of spicules ; eight radiate , cruciform , long warty 

 spindles, double clubs and irregular forms. The eight radiate kind is 

 most numerous. Axis entirely cream white, smooth without striation 

 or pits. 



Many large burrows for some commensal animal are found on the 

 front side of the branches. These burrows are about 30 mm in length. 

 They are different from those found in C. japonicum in having many 

 large lateral openings, which are, however, closed with coenenchym. 



About 200 mm in height, about 300 mm in breadth and 20 mm in 

 diameter near the root. 



I know one dry specimen only, got from a deep ground off Mera, 

 Bôshû. 



Corallium sulcatum n. sp. 



Branched in one plane, some branches anastomose with each 

 other. Coenenchym thin and it is light red in colour. Three or more 

 kinds of spicules ; eight radiate , cruciform and many irregular forms. 

 The octoradiate form is most abundant. Axis smooth, pinkish in 

 colour, variegated with lighter and darker colours. On the front side 



