46 



LIST OF THE BRITISH 



1 . Chorda Filum. 



2. „ Lomentaria. 



Order IV. DICT Y0TACE JE . 



Olive-coloured, inarticulate sea- weeds, whose spores 

 are superficial, disposed in definite spots or lines (sori). 



XIV. C UTLERIA. 



Frond ribless, irregularly cleft. Sori dot-like, scat- 

 tered. Root clothed with woolly fibres. 



1 Cutleria multifida. 



XV. Haliseris. 



Frond flat, linear, membranaceous, with a mid-rib. 

 Root a mass of woolly filaments. 



1. Haliseris polypodioides. 



XVI. Padina. 



Frond wedge-shaped at base, fan-shaped, concentri- 

 cally striate. Root coated with woolly fibres. 



1. Padina Pavonia. 



