I -J 



c>N Till; DKSMIDIE.E OF NORTH WALES. 



oxcellcut medium " The Midland Naturalist," taking the lead in the 

 introduction of this simple but important reform. 



The following list of Desmidiese comprises those found in the neigh- 

 bourhood of Capel Curig during the month of August, 1880, to which 

 are added some few taken during previous visits to North Wales. 



It necessarily includes the common as well as the rare species. 

 Those which have not hitherto been recorded from English habitats, 

 but which have been detected in Ireland or Scotland, are indicated by 

 an asterisk ; those which have not been hitherto discovered in the 

 United Kingdom, but which are known as European, American, or 

 Arctic species, by two asterisks. 



A notice of those believed to be wholly new will appear in a future 

 number of the " Midland Naturalist." 



Breb., De Brebisson. 

 Ehr., Ehrenberg. 

 II -.. Hassall. 

 Kiitz., Kiitzing. 

 Lund., Lundell. 



*Gonatozvgon Br6bissonii, De Bary.j 



Ralfsii, De Bary. 

 Hyalotheca dissiliens, Breb. 



mucosa, Ehr. 

 Didymoprium Borreri, Ralfs. 



Grevillei, Kiitz. 

 Desniidium aptogonum, Breb. 



Bwartzii, Agardli. 

 Spliarozosma excavatum, Balls. 



vertebratum, Kalfs. 

 'Spondylosium pulohellum, Archer 

 T< braohastrum mueronaturn, 



"Dixon, 

 oscitans, Hass. 

 pinnatindum, Kiitz. 

 'Miorasterias anguloBa, Hantsch. 

 Americana. 



,, forma major, 



' L Reiusch. 

 orenata, Breb. 

 denticulata, Breb. 

 liinbriata, Kalfs. 

 faroata, Agardh. 

 Jenneri, Ralfs. 

 papillifera, Breb. 

 radiosa, Agardh. 

 rotata, Ralfs. 

 trunoata, Breb. 

 brum affine, Ralfs. 



ampullaoeum, Kalis. 



nun, Ehr. 

 binale, Kalfs. 



var. augustatum, 

 Wittr. 



Abbreviations. 



Menegh., Meneghini. 

 Nag., Niigeli. 

 Nords., Nordstedt. 

 Wittr., Wittrock. 



Euastrum crassum, Kiitz. 



cuneatum, Jenner. 

 Didelta, Ealfs. 

 elegans, Breb. 

 gemmatum, Breb. 

 insigne, Hass. 

 oblongum, Balfs. 

 pectinatum, Breb. 

 verrucosum, Ehr. 

 Cosmarium bioculatum, Breb. 

 biretum, Breb. 

 Botrytis, Menegh. 

 Brebissonii, Menegh. 

 coelatum, Kalfs. 

 connatum, Breb. 

 conspersum, Ralfs. 

 crenatum, Ralfs. 

 Cucumis, Corda. 

 Cucui'bita, Breb. 

 *cyclicum, Lund. 

 03 lindricum, Ralfs. 

 granatum. Breb. 

 *IIolmiense, Lund. 

 ** ,, var. 



* *lseve, Nordst. and Wittr. 

 margaritiferum, 



[Menegh. 

 Meneghinii, Breb. 

 monihforme, Kalfs. 

 **nitidulum, de Notaris. 

 *Nymannianum, 



TGrunow. 

 orbiculatum, Ralfs. 

 ornatum, Ralfs. 



