genus is now restricted by Areschoug. It differs from /. rubens 
in its much greater size, its’ longer articulations, and the very 
erect ramification and strictly fastigiate tips. The Australian 
specimens are abundantly in fruit, and:closely agree with the 
original South African ones, described in ‘ Nereis Australis,’ 
except in having not quite such long“articulations. But this 
character varies on the African coast. 
A much commoner plant, on the Australian continent, is /. 
micrarthrodia, Lamx., which is known by its great tenuity, small 
size, and very short articulations. It abounds all along the 
west and south coasts, and may occur to the northward and 
eastward. 
Fig. 1. Janza rastiarata,—the natural size. 2. Upper branches, with cera- 
midia in the forks. 3. A ceramidium, with its two terminal ramuli, after 
the lime has been removed by acid. 4. Spore-threads :—maguified. 
