16 28 Proceedings of the Royal Irish Academy . 



*Schizochlamys delicatula West. — C, most abundant in many places. 

 gelatinosa A. Br. — C, 10-11'7/a broad, among Batrachospermum vagum; 



D, 10-11/* broad. 

 Sphaerocystis Schroeteri Chod. — K, SL; plankton of LG; VL; J), cells 8/* 

 broad. 



Sub-fam. Tetrasporeae. 



Tetraspora gelatinosa (Vauch.) Desv. — C, in several places, cells 8-1 5/* broad ; 



CP. 

 Apiocystis brauniana Nag. — C, W ; L, on Cladophora crispata. 



Sub-fam. Gloeocystideae. 



Gloeocystis gigas (Kiitz.) Lagerh. — C, 17-20/*, in another place 11-15/*, 



another gathering averaged 22//; L, M, SL, VL; W, ll'6-15/* 



mostly; D, 16-17/*; Cr, 10-11/*. 



vesiculosa Nag.— C, from 7'5 up to 11/* broad ; M, SL, L, LG, CI, W, B, D. 



rupestris Lyngb. — C. 



*Asterococcus superbus (Cienk.) Scherffel (=Gl. infusionum (Schrenk) W. & 



G. S. West).— 0, IT, I, L, CI, M, D, SL. 

 *Dactylothece Braunii Lagerh. — LG. 

 *Palmodictyon viride Kiitz. — C. 



"Coccomyxa subellipsoidea Acton. — C, forming jelly-like incrustations on 

 mosses. 



Class HETEROKONTAE. 



Order CONFEKVALES. 



Fain. Tribonemaceae. 



Ophiocytium cochleare (Eich.) A. Br. — C, L, W, D. 



bicuspidatum (Borge) Lemm. f. longispina Lemm. — C, in several places, 



26-29 x 5 5-6'5fj. without spines. 

 majus Nag.— C, IT, VL, CI, W. 

 parvulum (Perty) A. Br.— Cr, C. 

 Arbuscula (A. Br.) Eabenh.— CI, W. 

 •Bumilleria pumila W. & G. S. West.— C. 

 *Tribonema affiiie (Kutz.) G. S. West.— C, I. 



bombycinum (AgO Derb. & Sol.— C, 12-13-3 broad ; B,SL. L CI, W, CP. 

 f. minor (Wille) G. S. West.— W, C. 



