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 



