OP NEW SOUTH WALES. 317 



Genus Stylaster, Gray, 1831. 



Corallum dendroid, alternately but somewhat irregularly bud- 

 ding ; ccenenchyma highly developed with occasional little points 

 or vescicular tubercles ; columella styliform, placed deeply in the 

 visceral chamber ; septa equal, not projecting much, imperfectly 

 developed and few. 



Stylaster gracilis, Edw. St H. 



Corallum fan-shaped ; branches fitted somewhat closely, packed 

 but not coalescent, of a rose orange, with the exceptions of the 

 last ramifications, which are white ; the main trunk has a smooth 

 surface; the branches have microscopic striae, and are all covered 

 with subspinous tubercles ; the calices in an opposite vertical 

 series on both sides of the branches in general somewhat pro- 

 jecting; 12 to 13 rather thin septa, which are very exsert in the 

 terminal calices. None of them exceed § millim. in diameter. 



Not common on the east coast, north of Botany Bay. 



Stylaster sanguineus, Valenciennes. 



Corallum subflabelliform, the principal branches almost white, 

 the thinnest of an intense blood red ; vescicular tubercles 

 gathered in small groups presenting radiated costse, and separated 

 by little pits ; calices the same as the last, but some scattered on 

 the surface of the branches, somewhat projecting, § millim. in 

 diameter and with 12 septa. 



Rather uncommon on the east coast. 



Stylaster granulosus, Edw, Sf H, 



Branches irregular, of a rose purple, the surface covered with 

 very distinct papilliform granules ; tubercles small, few, radiately 

 costulate, slightly projecting ; calices on the surface of the 

 branches scattered, circular or oblong, with indistinct margins. 

 1 millim. wide. 



The habitat of this species is given as Australia, but I don't 

 remember to have seen anything like it, except an imperfect 

 fragment which came from Port Stephens. 



