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W. WEST AND G. S. WKST : ALGA-FLORA OV ^'ORKSHtRE. Tl 



All measurements arc iiWcn in mm. or thousandths of a 



mm. (ii.). I fi^=^-ooi mm. 



Of the complete alga-flora at least 55 species have not 

 previously been recorded for the British Isles; special mention 

 is made of this under the species. Mention is also made of 

 those varieties and forms which are similarly new records to 

 Britain. 



The following call for particular notice: — 



Honiilscla zo/iata (Webb & Mohr.) Aresch. var. hicolor (Y.\^g. 



Bot.) Nob. 

 Dcbarya mlos/ora (Palla) Nob. 



Penlum curtuin Breb. var. oblusnni AVest & G. S. A^'est. 

 Closfcrluui parvuhiin Nag. var. angustumW^^X. & G. S. West. 

 Ciostcr'ium signioideuDi Lagerh. k Nordst. forma major. 

 Closler'iuiii aciiluni (Lyngb.) Ralfs var. linea (Perty) Nob. 

 XaiithidiiDiL variabik AVest cS: G. S. West. 

 Cosmarlum suhprotumiduni Nordst. var. Gregorii {^^.0^ & Biss.) 



Nob. 

 CosiJiariiini FoJzoniyaniDJi (Grun.) Nob. 

 Cosinariuni cyviaiopleuruni Nordst. var. A 7x he rii {Roy !k Biss.) 



Nob. 



Cosmariinn idragoniiin (Nag.) Arch. var. Davldsonli {Roy ?<.x\^ 



Biss.) Nob. 

 Cossimrlum WilkiY\oh. var. ordinaiiun AVest .^ G. S. West. 



Cosmarlum pcricyinaiium Nordst. var. choraceuscW^^^^i^Q.'^. 

 West. 



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Sfaurasirum gladiosum Turn. var. dciicaii{lu}n\N<t^\. & G. S.\A'est. 

 Staurastrum pileolatiim Breb. var. i?n/j/7/67^yt'(Borg.) Liltkem. 

 RhapJiidium setigcrum (Schroder) Nob. 



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