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 BOTANY nothamnus stelliger, the county list can scarcely be regarded as a rich one. SUMMARY OF GENERA AND SPECIES CHARA TOLYPELLA Chara fragilis, Desv. Tolypella intricata, Leonh. aspera, Willd. NITELLA contraria, Kuetz. Nitella gracilis, Agardh hispida, L. translucens, Agardh vulgaris, L. flexilis, Agardh LYCHNOTHAMNUS opaca, Agardh Lychnothamnus stelliger, Braun. FRESHWATER ALG^E The county of Surrey is very rich in algae. The best gatherings can be obtained from the larger commons, the one at Thursley yielding the greater number of species. Puttenham Common is also very productive, especially General's Pond. Wherever the small carnivorous bladderwort (Utricularia minor) occurs a number of interesting algae are sure to be met with, and this interesting plant occurred on both these commons accom- panied by submerged species of bog moss (Sphagnum), which latter also are good indicators of the presence of small species of algas. On Thursley Common there is also an abundance of the fine richly-coloured julaceous moss (Hypnum scorpioides), which always indicates that algas will be prolific. A rather uncommon sedge (Rbyncospora fusca) also occurs on this common and the bog water surrounding this species never fails to be productive of algas. Among other localities which are well worth visiting by reason of their richness in these interesting plants are : Barnes Common, Bisley Common, Bolder Mere, Brockham Green to Betchworth, Chobham Com- mon and the neighbourhood, Ditton Marsh, Frensham (Devil's Jumps, bog by river Wey, the Great Pond and the Little Pond), Esher and Esher West-end Commons, Dorking, Earlswood Common, Felbridge, Hack- bridge, Mitcham Common and Grove, Putney Heath and Roehampton Lane, pond on Ranmore Common, Richmond Park, Wandsworth Common, Wimbledon Common, the canal at Woking, Whitemoor Common, Worplesdon, Witley Common, and in the south-east Blindley Heath, Crowhurst, Frogit Heath and Mill Pond east of Chapel Wood. The bluish-green algae (Myxopbyceee) are not represented as well as they would be if the county possessed some rocky hills, nevertheless the county is one of the richest in England. The reader must bear in mind that the use of the microscope is absolutely essential to the discovery even as well as to the determination of all but an extremely few of these algae. They are exceedingly pretty objects and will amply repay the attention of any investigator. Those in the following list, including a new genus to science and twenty species and varieties also new to science no less than fifty-nine in number were recorded for the first time in the British Isles from 57