122 CLASS II.— ORDER II. 



culations long, and covered with warty pustules ; ca- 

 lour greenish ; height from four to five centimetreSe 

 —Plate 9. ^g. 4. a. B. 



South America. 



Nota, Many species appear warty as well as this; 

 their asperities are probably owing to some extraneous 

 calcareous deposition, perhaps to some more stony 

 Polypidom. Far from making a part of the Polypi- 

 dom, these asperities are easily detached on being 

 slightly rubbed, leaving bare the cretaceous enve- 

 lopes of the Jania. 



SMALL-JOINTED. 



7. Jania micrarthrodia» Articulations very short, 

 and contiguous each to other ; colour greenish red ; 

 height from two to three centimetres. — Plate 9. fig. 5. 

 a. B. 



On the fucus of Australasia. 



Nota, This species is only distinguished from the 

 one that follows by the articulations, of which the 

 length does not exceed their diameter in the first, 

 but is from four to six times longer in the second. 



RED. 



8. Jania rubens. The articulations of the dicho- 

 toma are in the form of clubs, the other articulations 

 cylindrical ; ovaria of many forms, solitary or con- 

 nected as if strung, those at the extremities always 

 accompanied with one or two appendages. 



European seas. 



Variety A. Branches long ; no ovaria. — Plate 9. 

 fig. 6. 



European seas. 



