ALGJE OF WEST IRELAND. 213 



Plate XVITI. {continued). 



Fig. 6. Botryococcus calcareus, West. 400/1. 



7. Scenedesmus dent iculat 'us, Lagerh., var. I meat us, West. a, 400/1 ; 



a' et a", 625/1. 



8. Anabcena (Sphmrozyga) orthogona, West. 400/1. 



9. Aphanocapsa Greviltei, Eabh., var. microgranula, West. 600/1. 



10-12. (Edogonium londineyxse, Wittr., var. compression, West. 400/1. 



13. Chlorococcum gigas, Grun., var. maximum, West. 400/1. 



14. Acanthococcus sp. 400/1. 



15. Polycdriion tctracedricum, Naeg. 400/1. 



16. Closterium moniliferum, Ehrnb. (c. Chytridio). 



17. Mougeotia elegant ula, Wittr., forma microspora, West. 400/1. 



Plate XIX. 



Fig. 1. Sph&rozosma Aubertianurn, West. 400/1. 



2. Spondylosium tetragonum, West. 400/1. 



3. „ pukhrum, Arch., var. triquetrum, Lund. 400/1. 



4. Forsan seniicellulaa juveniles duae Cos mar ii abnormalis in stato divi- 



sions. 625/1. 



5. Docidium dilated urn (Cleve), Lund. 400/1. 

 6. 



>> if if 11 



7 



' • 11 11 11 M 



8-10. Plcurotamium coronatum, Rabh. 400/1. 



11. ,, „ „ \fxr.fluc 



12 



400/1. 



var. subundulatum, West. 400/1. 



West. 400/1. 

 var. robustum, West. 400/1 . 



t. 400/1. 



. 4. „ toxon, West, a, 600/1 ; a' et a", 400/1. 



15. ,, gracile, Breb., forma gracillima, West. 400/1. 



16. „ subtile, Breb., forma. 600/1. 



17. Penium exigioon, West, a et a", 600/1 ; «', 400/1. 



18. „ „ „ a , 600/1 ; a', a", et A, 40O/1. 

 10. „ adelochondnon, Elfv. 400/1. 



Plate XX. 



West. 400 



»> >> >» »» »» 



3. 

 4. 



»> •» ft t* ft 



var. undulation. West. 400 



forma punctata, West. 400/1 

 forma in flat a, West. 400/1. 



>» >» »» 





5. Cylindrocystis diplospora, Lund, *major, West. 400/1 



EOfeft 



400/1. 



Ralfs. var. attenuatus, West. 400/ 



8. Spirot<enia bispiralis, West. 400/1. 



9. Micrasterias pinnatifida, Ralf s, forma. 400/1. 



10. u papillifera, Br6b., var. glabra, Nord., forma in flat a, West. 



400/1. 



