CORALLINES. 
127 
hippuris, represented in Fig. 46, has a singular resemblance to the 
ommon Marsh Plant ( Hippuris vulgaris). 
hour other species of Isidians are known. The same family includes 
e genera of Melitsea and ifopsea, which, however, our limits forbid 
Rs to describe. 
CoKALLIIiZE. 
The group of Corallines consist of a single genus, Cor allium, having’ 
a common axis, inarticulate, solid, and calcareous, the typical species of 
w ic furnishes matter hard, brilliant, and richly coloured, and much 
■ ought after as an object of adornment. This interesting zoophyte 
an< * ts product requires to he described with some detail. 
