CRYPTONEMIACExE. 187 



is perennial, and may be found during spring and sum- 

 mer on every rocky shore. It grows between the tide- 

 marks and in deep water. 



Genus LXXXV. CHYLOCLADIA. 



Frond tubular, rounded or somewhat flattened, much 

 branched ; its inner stratum composed of elongated and 

 anastomosing filaments ; its outer stratum of roundish, poly- 

 gonal cells, which become smaller towards the surface, and 

 form a membranaceous bark. Spores formed on fibres, which 

 radiate from a placenta, enclosed in a transparent sac, in ex- 

 ternal, conical conceptacles with a terminal pore ; tetraspores 

 tripartite, scattered among the surface cells of the branches. 

 — Chylocladia, from the Greek chylos, juice, and klados, 

 a shoot. 



The species composing this genus have been changed 

 under the new arrangement. Those which were for- 

 merly Chylocladice are now, with one exception, Lomen- 

 tarice, and the Ckrysymenice have become Chylocladice. 



Chyle cladia articulata. The jointed Chylocladia. 



Fronds growing in dense tufts, from two to ten inches 

 long, tubular, filled with fluid, somewhat gelatinous, strongly 

 constricted throughout, much branched ; the lower branches 

 forked, the upper pinnate, whorled, tufted. Spores in ob- 

 tusely conical conceptacles, which have thick walls composed 

 of small cells, and a minute terminal pore, and are scattered 

 over the upper joints of the frond; tetraspores tripartite, 

 lodged in the tissue of the joints. 



This is the only British species of the old genus 

 Chylocladia, which retains its name. It is common 

 all round our coast during summer, and is annual. It 

 grows on rocks, between the tide-marks, usually under 



