Adams — A List of S//noni/ms of Irish Alyae. 209 



YIII.— Phaeophyceae. 



Puiicfcaria 



baltica Batt. C U. 



Doubtful. 



Streblonema 



pseudosolitarium. Jolinson. 

 Ireland. 



IX. — Rhodophyceae. 



Gracilaria 



compressa G-rev. L. 

 Porphyra 



amplissima [Kjellm.). L U. 



laciniata Ay. M L U. 

 Ehodochorton 



purpureum Rosenv. M U. 



COERECTIONS AND EREATA. 



The different groups are reviewed in the order in which they appear in 

 the " Synopsis," the Freshwater Species being taken first. 



Freshwater Peridinibae. 

 The following species should be deleted : — Peridinium alatum Garbini. 



Freshwater Diatomaceae. 



(«) The following species should be deleted : — Achnanthes subsessilis 

 K'utz., Amphora membranacea W. Sm., Campylodiscus Echeneis Elir., Denti- 

 cula crassula Nag., Eucyonema caespitosuni Kiitz.., Eunotia robusta Ealfs., 

 Navicula peregrina Kutz., Nitzschia constricta Pritcli., N. filiformis W. Sm.. 

 N. navicularis Grun., N. paradoxa Grun., N". Sigma W. Sm., Pleurosigma 

 attenuatum W. Sm., P. Spencerii W. Svi., P. strigile W. Sm., Surirella Smithii 

 Half's., Synedra lunaris Uhr., S. spleudens Xiiiz. 



(b) Cymbella Cistula Kirchu. should be C. Cistula Kirchn., C. lanceolata 

 Kirclm. should be C. lanceolata Kirchn., Epithemia globifera Heib. should be 

 E. globigera Heib., Navicula serians Breb. should be N. serians Kittz., 

 IST. spaerophora Kiitz. should be N. sphaerophora Kutz., Synedra Acus Kutz. 

 should be S. Acus Gi-un., Cyclotella accuminata W. Sm. should be C. 

 acuminata W. Sm. 



Freshwater Cyanophyceae. 



(«) The following species should be deleted : — Anabaena variabilis Kiitz., 

 Calothrix Dillwyni Cooke, Chroococcus minor Nag., Clathrocystis aeruginosa 

 Henfrey, Gloeocapsa crepidinum Thur., Or. Paroliniaua Brib., Hapalosiphon 

 Braunii Nag., Hydrocoleus Lyngbyaceus Kiitz., Oscillatoria aerugescens Hass., 

 Phormidium inundatum Kiitz., P. spadiceum Kiitz., Eivularia calcarea Sm., 

 E. echinata Cooke, E. echinulata Born, ct Flah., E. natans Wclw., E. Pisum Ag.^ 

 Scytonema ambiguum Born, ct Flah., S. calotrichoides Kiitz., Symplocastrum 

 Friesii Kirchn., Synechococcus elongatus Nag., S. parvulus Nag., Tolypothrix 

 aegagrupila, Kiitz. 



[2F*] 



