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 BOTANY also abundant.' Stormy weather from the south-west considerably affects the growth of algas in Sussex, and brings occasionally such strangers as Sargassum vulgare to our coast. The Melanospermeae are numerous and include the largest seaweeds, or ' forest trees of the deep,' many of which grow on our shore. They are mostly common, but as exceptions we have Sphacelaria plumosa, Lyng, first discovered by Borrer at Beachy Head ; Asperococcus Turrieri, Hook ; Stilophora rhizoides,]. Ag. ; Striaria attenuata, Grev. ; and Litosiphon pusillus, Carm., on old fronds of Chorda Jilum. The Rhodospermeas have the most beautiful hues, rose-red, pink, purple, and red-brown when growing in deep water, while in shallower they degenerate to a greenish or yellowish colour. They are also ex- quisite in form. These contain more than a moiety of the British species. Among the rarer which we possess are Rhodomela lycopodioides D. Ag. ; Bonnemaisonia asperagoides, C. Ag. ; Dasya arhuscula, C. Ag. ; Polysiphonia Brodicei, Grev, ; Gracillaria erecta, Grev. ; Griffithsia Devo?iiensis, Harv. ; and the handsome CaUthamnion Borreri, so named in honour of Borrer. The Chlorospermex are well represented. The rare and curious Codium bursa, Ag., is occasionally thrown up at Brighton after a storm, and fourteen species of Cladophora have been found there. Conferva melagofihm, Web., grows at Shoreham. Among the Ulvaceas, Entero- morpha erecta. Hook, occurs at Eastbourne, and Uha linza at Brighton. The following list is arranged according to Dr. Harvey's Synopsis. MELANOSPERME^ RHODOSPERME^ FucACE^ Rhodomelace^ Cystoseira granulata, Ag. Brighton Rhodomela lycopodioides, Ag. Brighton — foeniculata, Ag. Brighton — scorpioides, Ag. Shoreham — ericoides, Ag. Brighton Polysiphonia spinulosa, Grev. Brighton Pycnophycus tuberculatus, Kutz. Hastings — Brodioei, Grev. Brighton Fucus ceranoides, L. Eastbourne — furcellata, Harv. „ Sporochnace^ — fibrillosa, Grev. Shoreham Desmarestia ligulata, Lamour. Brighton — elongella, Harv. Brighton — vividis, Lamour. Brighton — atronitens, Grev. Hastings Arthrocladia villosa, Duby. Brighton — byssoides „ „ Sporochnus pedunculatus, Ag. Hastings Dasya coccinea, Ag. Seaford Laminariace^ — venusta, Harv. Brighton Laminaria Phyllitis, Lam. Hastings — arbuscula, Ag. „ — fascia, Ag. Brighton Laurenciace^ DiCTYOTACEiE Bonnemaisonia asparagoides, Ag. Brighton Cutleria multifida, Grev. Shoreham Laurencia tenuissima, Grev. „ Asperococcus echinatus, Grev. Brighton Chrysimenia clavellosa, Ag. Hastings Litosiphon pusillus, Carm. Brighton Chylocladia reflexa, Cham. Brighton Chordariace^ Corallinace^ Mesogloia Griffithsiana, Grev. Brighton Corallina squamata, Ellis. Hastings Leathesia tuberiformis. Gray. Hastings Jania corniculata. Lam. Eastbourne Myrionema punctiforme, Harv. „ DelesseriacEjT EctocarpacEjB Delesseria sanguinea, Lam. Bognor Sphacelaria scoparia, Lyng. Brighton — hypoglossum, Lam. Hastings — sertularia, Lyng. Hastings — ruscifolia, Lam. Hastings Ectocarpus fasciculatus, Harv. Hastings Nitophyllum punctatum, Grev. Brighton — brachiatus, Harv. Hastings — Gmelini, Grev. Hastings — pusillus, Griffiths. „ Plocamium coccineum, Lyng. Hastings 63