cbyptonemiacejE. 175 



valuable plant, which he collected in the locality, where 

 it was originally found by Dr. Cocks. 



Genus LXXVII. PHYLLOPHORA. 



Frond stalked, the stalk expanding into a rigid, mem- 

 branaceous, flat lamina, proliferous from the disc or margin,, 

 without veins, or slightly veined at the base. Spores mi- 

 nute, contained in sessile or stalked conceptacles ; tetra- 

 spores cruciate, contained in external, scattered warts. — 

 PhtIiIOPhoea, from the Greek phyllon, a leaf, and phero, 

 to carry. 



The plants of this genus are mostly common on ex- 

 posed coasts ; they grow near low-water mark, or at a 

 greater depth. Some of them are to be found on the 

 Atlantic coasts of both Europe and America, and some 

 extend into the Baltic Sea; others are content with a 

 more limited range. 



Phyllophora Brodisei. Brodie's Phyllophora. 



Frond of a deep red colour, composed of a cylindrical, 

 branched stem, three to four inches or more long, the 

 branches expanding into oblong or wedge-shaped lobes, 

 which are frequently proliferous from the extremities. 

 Eoot a small disc. Spore-conceptacles globose, stalkless, 

 developed on the lamina ; tetraspores in warts, at the tips of 

 the frond. 



This plant is one of the least common of the genus 

 Phyllophora, and is chiefly confined to our northern 

 shores. It adheres very imperfectly to paper in drying. 

 It is said to be perennial, and grows on rocks in deep 

 water during winter and spring. Dr. Harvey describes 

 a "var. /8. simplex. Stem short, expanding into an 



