1863.] MARINE AhGJE FOUND AT BRIGHTON. 519 



Dictyota dichotoma R R. 



Stilopliora rhizodes R. Plentiful in 1861. 



Striaria attenuata. Same. 



Punctaria plantaginea R. One or two specimens only. 



Punctaria tenuissima R. Same. 



Asperococens compressus ! f. In 1861. 



Asperococcus Turneri R., but plentiful in August, 1860. 



Asperococcus eelunatus R. f- Black Rock. 



Mesogloia vermicularis R. In 1861 only, 



Mesogloia GriiTithsiana. Same. 



Mesogloia vircscens, var. R. In 1860. 



Elacliista fucicola ! 



Elachista scutellata ! 



Elachista velutina ! 



Myrionema strangiiians ! 



Myriouema Leclancherii ! 



Cladostephus verticillatus ! 



Cladostephus spongiosus ! t- Black Rock. 



Chsetopteris plumosa R. Young plants on Coditim iursa, and at root of Laminaria 

 digitata. The root of C. plumosa is described as a disk ; but when growing on 

 C. bursa the root consists of straight, articulated, hyaline fibres, which extend 

 vertically downwards through the substance of C. bursa, as if to secure a 

 tighter hold. 



Spliacelaria Sertularia R. At roots of Zostera, and on Codium bursa. 



Sphacelaria scoparia ! 



Spliacelaria cirrhosa ! 



Sphacelaria radicans ! f. Black Rock. 



Ectocarpus siliculosus ! ! f. 



Ectocarpus fenestratus R R 1 . 



Ectocarpus fasciculatus. 



Ectocarpus Hincksiee. 



Ectocarpus tomentosus. 



Ectocarpus pusillus ! R. 



Ectocarpus littoralis ! 



Ectocarpus granulosus ! ! 



Ectocai'pus Mertensii ! ! Rocks below Crescent. 



Rhodosperme^. 



Chondria dasyphylla ! f . More frequently washed ashore. 



Chondria dasyphylla /3. slender variety. 



Chondria dasyphylla, var. with recurved ramuH. See ' Phycologia Britannica.' 



Chondria tenuissima R. Very fine, with fruit of both kinds. 



Rhodomela subfusca f. More frequently washed ashore. 



Rytiphlsea pinastroides ! ! ! 



Polysiphonia formosa ? 1. 



Polysiphonia pulvinata R R. June, 1859. 



Polysiphonia fibrata, var. foetidissima. I have found specimens with tetraspores, 



but never with capsules. 

 Polysiphonia elongoUa R. 

 Polysiphonia elongata ! ! 



