BOTANY 



elegans, C. endivtefolia, or the elegant fronds of Drapardnaldia plumosa, the 

 tufts of sphagnum rich gatherings of Desmids. The hoof holes formed 

 in the marshy heathland are usually rich in Micrasterias, Euastrum and 

 Straurastrum, and in some of the clear pools the beautiful Vohox globata 

 may be found in abundance. On wet rocks in the Dove dale Glceocystis 

 botryoides, Nostoc pruniforme and Chroolepus aureus have been found, and 

 in the Dove and other rapid streams of that district the gelatinous masses 

 of Batrachospermum moniliforme and B. atrum are sometimes abundant. 



The following list of freshwater algas has been compiled partly from 

 Garner's Natural History of Staffordshire, from the Proceedings of the 

 Birmingham Natural History Society and from the writer's observations. 



Ord. I. COCCOPHTCE&. 

 I. PALMELLACE^: 



Pleurococcus vulgaris, Menegh 

 Gleocystis botryoides, Kutz 

 Palmella hyalina, Breb. 

 Porphyridium cruentum, Nag. 

 Botrydina vulgaris, Breb. 

 Tetraspora bullosa, Ag. 



lubrica, Ag. 

 Botryococcus Braunii, Kutz 

 Apiocystis Brauniana, Nag. 



II. PROTOCOCCACE^: 



Protococcos viridis, Cohn 

 Scenedesmusquadricaudatus, Br6b. 

 Pediastrum angulosum, Ehr. 



Boryanum, Turp. 



III. VOLVOCINE^E 



Chlamydococcus pluvialis, A. Braun 

 Volvox globator, L. 

 Pandorinum morum, Ehr. 

 Gonium pectorale, Mtill. 



Ord. II. ZTGOPHTCE& 

 IV. DESMIDIE^ 



Desmidium Swartzii, Ktitz 

 Closterium lunula, Mull. 



Dianas, Ehr. 



juncidum, Ralfs. 



rostratum, Ehr. 

 Penium digitus (Ehr.), Ralfs. 

 Tetmemorus Brebissonii, Ralfs. 

 Micrasterias rotata, Ralfs. 



denticulata, Br6b. 



truncata, Corda 



papillifera, Breb. 

 Euastrum verrucosum, Ehr. 



- oblongum, Ehr. 



- didelta, Turp. 



insigne, Hass. 



elegans, Ehr. 

 Cosmarium pyramidatum, Bre'b. 



Cosmarium Meneghinii, Ralfs. 



undulatum, Cor. 



Brebissonii, Meneg. 



botrytis, Bory. 



biretum, Breb. 

 Xanthidium cristatum, Ralfs. 

 Arthrodesmus incus, Breb. 

 Straurastrum dejectum, Ralfs. 



polymorphum, Br6b. 



orbiculare, Ralfs. 



- punctulatum, Breb. 



- hirsutum 



V. ZYGNEMACE/E 



Zygnema cruciata, Vauch. 

 Spirogyra nitida, Dillwyn 



condensata, Vauch. 



flavescens (Hass.), Cleve. 



longata, Vauch. 



porticalis v. quinina, Ag. 

 Zygogonium ericetorum v. terrestris, De 



Bary 

 Mesocarpus scalaris, Hass. 



Ord. III. SIPHOPHTCE& 

 VI. BOTRYDIACE^: 



Botrydium granulatum, L. 



VII. VAUCHERIACE^: 



Vaucheria Dillwynii, Ag. 



terrestris, Lyngb. 



sessilis, Vauch. 



geminata, Vauch. 



Ord. IV. NEMATOPHTCE& 

 VIII. ULVACE^E 



Prasiola crispa, Kutz 

 Enteromorpha intestinalis, Link. 



IX. CONFERVACE^: 



Conferva bombycina, Ag. 

 Cladophora crispata, Roth. 



glomerata, L. (Dillw.) 



69 



