Cushman : New England Saccodermae 347 



* 1 1 . Mesotaenium minimum sp. nov. 



Cells minute, 3 times as long as wide, the apices broadly 

 rounded, imbedded in mucous masses ; chloroplast an axile plate. 



Length 14//: breadth 4.5//. 

 R. I.: Nyatt! (Collected b 



J 



12. Mesotaenium Endlicherianum Nag. Gatt. Einzell. Algen 



109. pi. 6B. 1849. — Wolle, Desm. U. S. 32. //. j. /. //. 



1884, 



Cells cylindrical, about three times as long as wide, the apices 

 broadly rounded ; cells free-swimming ; chloroplast an axile plate. 

 Length 25-31: breadth 8-10 ft. 



N. H. : Intervale, frequent ! Mass. : Lake Quinsigamond, 



Worcester (Stone). North Lake Watuppa, Fall River ! Swansea ! 



CYLINDROCYSTIS Menegh. 1838 



13. Cylindrocystis Brebissonii Menegh. Accad. Sci. Torino, 

 Mat. e Fis. II. 5 : 89. //. 12. f. 13. 1&43. —Penium Brebis- 

 sonii Wolle, Desm. U. S. 36. pi. 5. /. 7, S. 1884. 



Cells cylindrical, 2^-3 times as long as wide, the apices 



rounded ; chloroplast stellate with few large radiating processes. 

 Length 50-62//: breadth 17-18 p. 



Me. : Along Penobscot River, near Orono {Harvey). Mass. : 

 Amherst (W. West). West Bridgewater ! Tom Never's Pond, 

 Nantucket ! 



Cylindrocystis Brebissonii minor W. & G. S. West, Trans. 



Roy. Irish Acad. 32B 1 : 20. //. -?./, 7. 1902. 



Cells narrower and shorter than the typical form. 

 Length 28-32//: breadth 12-13//. 



N. H. : Intervale ! Mass. : Westport ! Great Miox's Pond, 

 Nantucket ! 



14. Cylindrocystis crassa 



1-12. 1828. — Penium t 



DeBary, Conj. 37. 74. pL 7. /. C. 

 rassa Wolle, Desm. U. S. IJ. pi. 5./. 



3. 1884. 



Cells oblong-cylindrical, twice as long as wide ; chloroplast 

 as in C. Brebissonii. 



Length 40 ji : breadth 20 u. 



Me.: Orono (IV. West). N. H. : Mt Moosilauke ! Mass.: 

 Amherst ( W. West). 



