161 





57- -S". cyrtocerum, Breb., p. 128, PI. XLII.— Small pools 

 and ponds about Orono. 



^?>. S. macroceriim, Wolle, p. 134, PI. XLIIL— Chemo 

 pond, five miles east of Orono. 



59- -S". Sebaldi, Rei'nsch, p. 138, PL XLVI.— Old well, col- 

 lege farm, Orono. 



60. 5. Brebissonii, Arch., p. 141, PI. XLV.— Old well, col- 

 lege farm. Interesting, as Florida was the only habitat before 

 known. 



&\. S, Saxonicmn, Buinh., p. 141, PI. XLV. — Pools along 

 the Penobscot at Old Town and Great Works. 



62. S, Saxonicum, Bulnh., var. PENTAGONUM, n. van — Struc- 

 ture similar to the type form ; size slightly smaller, 62 /f diame- 

 ter ; end view pentagonal ; sides somewhat concave or straight 



First observed in gatherings from a shallow pool on the bank 

 of the Penobscot at Old Town. Later it was found at other 

 points along the river about Orono. It is usually associated with 

 the type form. 



^l^ S. furcigertnn, Breb., p. 146, PL XLVIIL— Pot holes 

 and pools, Penobscot River, Orono. 



64. 5. spojigiostim, Breb., p. 148, Ph XLVII. — Pools along 

 the Penobscot, Orono. 



Class III. — Cyanophyce^. 



Family XVIII. — Nostocaceae. 



65. Tolypothrix 7Husctcola, Kg,, p. 264. PI. CLXXXI. — ^Old 

 well, colle^ie farm. Plentiful. 



66. Hapalosiphon Brataiii, Kg., p, 275, PL CXCVL— With 



the above. 



T 



67, Nostoc commtnufum. Kg., p. 2Z2. — Abundant in a gath- 

 ering made from a pool In the Penobscot at Great Works by Mr. 



PL CXCVII.— This form 



Merrill. 



68. Nostoc rtipestre^ Kg., p. 283, 

 was found in a lake near Houlton, Me. 



Several species of Oscillaria have been observed, but they 

 have not yet been studied enough to give determinations. 



