188 



139- Staicrastmm imitiaim^ Breb. p. 119, PI. XXXIX. 

 Swamp back of college woods. Aug. 



140. St. dejcctinn, Breb. p. 121, PL XL — With above. Aug. 



Also roadside pool west of Orono. June. 



141. St, dejecirmi, var. mucronaiitm, Ralfs. Moosehead 

 Lake. Gathering by Dr. Young. Specimens 48 /^ diameter. 



July. , ^ 



142. St. Dickiei, Ralfs, p. 122, PL XL.— Swamp back of 

 college woods. Aug. 



143. St. margaritacetan, Ehrb., p. 125, PI. XLI. — Moose- 

 head Lake. July. (Dr. Young). 



St. polymorphum, Breb., p. 126, PL XLII.— Reported before, 

 (No. 53) but specimens found this season were pcntagonal'm end 

 view and the diameter 48 yw. 



144. St. regiclosum, Breb., p. 127, PL XLL — Swamp back 

 of college woods. Oct. 



145 St. alternans, Breb., p. 128, PL XLI, — Associated with 

 Staurospcrnnim viride: Guagus Stream. July. 



146. St. gracile, Ralfs, p. 133, PL XLIII. Swamp back of 

 college woods. Aug. 



147. St. aculeatum, Ehrb., p. 140, PL XLV.— With above. 

 Aug. 



148. St. echiuatum, Breb., p. 141, PL XLV. — With above. 

 Also roadside pool west of Orono. Aug. and June. 



149. St. spongiosum, var. Amei-icajimn, Turner, Some New 

 and Rare Desmids, Jour. R. M. S., Ser. II, VoL V. Swamp 

 back of college woods. Aug. 



Class III. — Cyanophyce.^. 



Family XVIII. — Nostocaceae. 



150. NODULARIA Mainensis, n. spec. Trichomes long, 

 33 to 38 ^ wide, aeruginous; articulations, short, 2 to 6 or more, 

 frequently 4 to 6 in diameter ; sheath distinct but close ; hetero- 

 cysts compressed, oval, orange, yellow or brownish-yellow, more 

 or less at regular intervals. Found intermingled with VancJicria 

 sessilis, in Pushaw Stream, a tributary of the Penobscot, near 

 Orono, Maine. July, 1888. Collected by F. L. Harvey. Mr. 

 WoUe has examined specimens and regards it as new. 



