der niederen Thiere während der J. 1870 u. 1871. 291 



numerous very slender fusiforme spicules in bundles, placed in dif- 

 ferent directions. Polype-cells short, cylindrical, covered with spi- 

 cules like the bark, with a smooth convex eight-rayed lid, placed 

 close together on ,the sides of the branchlets, and more scattered 

 and further apart on the sides of the branchlets. 



Phaeocella Gr. Coral branched, fan-like; stem rather com« 

 pressed; branches irregularly furcate, all in one plane, cylindrical, 

 rarely tapering at the end ; branchlets, some subpinnate, others sub- 

 secund on the upperside of the branches. Bark thin, formed of 

 abundance of small fusiforme, opace spicules placed in groups in 

 different directions. Polype-cells small on all sides of the stem and 

 the branches, ascending, with a rather hood-like outher surface, 

 forming a short cylindrical tubercle, formed of spicules like those 

 of the bark. Axis continuous, horny, black; branches and branch- 

 lets tapering. 



Bovella Gr. Coral branched, fan-shaped, expanded into an 

 oblong frond ; stem simple ; branches and branchlets slender, of the 

 same diameter throughout, branches radiating and irregularly furca- 

 tely divided, with abundance of shortly branchlets arranged rather 

 pinnately and diverging at nearly right angles, forming a more or 

 less regulär network; many of the branchlets, especially the mar- 

 ginal ones, free. Bark furfuraceous, formed of very small soft spi- 

 cules or thin scales. Polype-cells circular, prominent, with a sun- 

 ken centre and a furfuraceous surface, placed on all sides of the 

 branchlets and on the internal surface of the branches. Axis con- 

 tinuous, horny, black. 



Menella Gr. Coral cylindrical, end (of the branches?) cla- 

 vate, rounded, surface spiculose. Polype-cells on all sides of the 

 cylindrical stem (and branches), close together, forming a rough 

 spiculose surface with hexagonal areolae. Polypes retractile; when 

 retracted, convex, with an oblong concavity, surrounded with spicu- 

 les. Axis horny, black. 



Bhipidella Soland. Coral flabellate, netted. Polypes re- 

 gulär,, scattered, in small prominent warts. Axis cork-like, with 

 scattered nodules. 



Lignella Gr. Coral branched; stem cylindrical, tapering; 

 branches fan-like, in one plane , angularly diverging. Bark thin, 

 pliable. Polype-cells elongate, prominent, scattered in the stem, 

 and rather far apart in the two sides of the branches. Polypes with 

 eight tentacles. Axis cylindrical or rather compressed, soft, wood- 

 like, and white, spinulose. 



Leucoella Gr. Coral fan-like, in the same plane, compres- 

 sed ; branches furcate, upper side convex or angular, lower side 

 concave, smooth, barren, with a more or less wide central groove. 



