116 CLASS II.— ORDER I. 



blended ; probably in the midst of the sea, and whilst 

 their polypi are living, the Galaxauras, as well as 

 the Neseas and Acetabularias, are of a more or less 

 bright grass-green, slightly tinged with violet. 



The height of these Polypidoms is not considerable, 

 rarely exceeding a decimetre ; and there are some 

 which scarcely reach three centimetres. 



It is with these that I shall conclude the description 

 of the species belonging to this genus, which seems 

 naturally to unite itself with the one which follows, 

 viz. the Janias, an intermediate link between the Ga- 

 laxauras and the Corallinas. 



OBLONG. 



1. Galaxaura oblongata. Articulations long, 

 and rendered flat by desiccation : rind or exterior very 

 thin, and inclining to red. 



Seas of America and coast of Portugal. 



UMBELLATED. 



2. Gal AX AURA umbellata. Branches dichotomi- 

 sing at every articulation, and each rising to the same 

 height, which gives the Polypidom the form of an um- 

 bel ; the diameter of the stems and their branches 

 about three millemetres ; colour inclining to white ; 

 height from six to eight centimetres. 



Caribean sea. 



OBTUSE. 



3. Galaxaura obtusata. Articulations oblong 

 and oval, rounded at both extremities. 



Coasts of the Bahamas. 



