G. ALCYONIUM. 249 



or greyish; height from seven to twelve centime- 

 tres. 



Indian Ocean. 



TUBEROUS. 



30. Alcyonium tuberosum. Yellowish and tube- 

 rous ; summits frequently a little divided ; cells tu- 

 bulous and approximate. 



Coasts of the Island of Mauritius. 



FIG-SHAPED. 



31. Alcyonium Jicus. Mass in the form of a fig or 

 pear ; almost oval, pulpy, livid, perforated at the 

 summit, and presenting from one to three oscules. 



Mediterranean. 



CYLINDRICAL. 



32. Alcyonium cylindincum. A solid cylindrical 

 mass, of the thickness of a finger, with oscules placed 

 on a side range, and common to several cells. 



ROOT-FORMED. 



33. Alcyonium radicatum. Cells very small, 

 and dispersed ; base with many clefts. 



Southern Africa. 



GELATINOUS. 



34. Alcyonium gelatinosum. Of various shapes, 

 greenish and pediculated ; pedicle cylindrical, of the 

 thickness of a crow-quill, and with a base; polypi 

 transparent, with a funnel-shaped body, having a mar- 

 ginated border, armed with twelve equal, long, and 

 filiform tentacula. 



European Ocean. 



Cor. 2 I 



