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PREPARATIONS OF ALG.E. 
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Gloiotrichia gigantea, Bab. 
Scytonema myochrous, Ag. 
Sirosiphon Bouteillei, Breb. & Desm . 
Glceocystis vesiculosa, Naeg. 
Palmella mucosa, Ktz. 
,, botryoides, Ktz. 
Apiocystis Brauniana, Naeg. 
Yolvox globator, L. 
Protococcus viridis, Ag. 
Hydrodictyon utriculatum, Both. 
Penium oblongum, De Bary. 
Closterium acerosum, Balfs. 
Pleurotoenium baculum, Breb. 
Cosmarium cucumis, Both. 
Euastrum oblongum, Balfs. 
Micrasterias rotata, Balfs. 
Staurastrum cuspidatum, Balfs. 
Zygnema nitidum, Hass. 
Zygogonium ericetorum, Ktz. 
Mesocarpus ovalis, Hass. 
Pleurocarpus mirabilis, A. Braun. 
Hyd rogas trum gr anulatum, L. 
Yaucberia terrestris, Hass. 
Prasiola crispa, Ktz. 
Sphceroplea annulina, Ag. 
Cladophora glomerata, L. 
Bulbochaete setigera (Both), Ag. 
(Edogonium Boscii, Breb. 
Ulothrix tenerrima, Ktz. 
Schizogonium murale, Ktz. 
Chroolepus aureus ( L .), Ktz. 
Chaetophora endivoefolia (Both), Ag. 
,, radians, Ktz. 
Coleochaete scutata, Breb. 
Draparnaldia glomerata ( Vauch ), Ag. 
Porphyridium cruentum, Naeg. 
Cbantransia Hermanni (Both), Desm. 
Batrachospermum moniliforme, Hass. 
Lemania torulosa (Both), Ag. 
For information concerning them, apply to W. Joshua, 
Esq., F.L.S., Cirencester. 
Apropos of this subject, the Editor of this Journal would be 
thankful for lists of British Freshwater Algae (exclusive of 
DiatomaceaeJ in order to their incorporation in a work now in 
preparation ; in which geographical distribution is desirable to be 
recorded. 
