MAEINE ALGJE. 



49 



1. Asperococcus compressus. 



2. „ Turneri, 



3. „ echinatus. 



XXV. Litosiphon. 



Frond cartilaginous, unbranched, cylindrical, com- 

 posed of several rows of cells. Spores scattered. Grow- 

 ing parasitically on Chorda Filum. 



1. Litosiphon pusillus. 



2. „ Laminariae. 



Order V. CHORD ARIACEiE. 



Olive-coloured sea- weeds, with a gelatinous or carti- 

 laginous frond, composed of vertical and horizontal fila- 

 ments interlaced together. 



XXVI. Chordaeia. 

 Frond filiform, much branched, cartilaginous. 



1. Chordaria flagelliformis. 



2. „ divaricata. 



E 



