26o Minnesota Algae 



Massachusetts. On stones more or less embedded in the sand, a little 

 above low water mark. Revere Beach. January and February. (Collins). 

 West Indies. On wreck on beach. Port Morant, Jamaica. March 1893. (Hum- 

 phrey). On Galaxaura, etc. Santurce, Porto Rico. May 1903. (Howe). 



468. Calothrix pulvinata (Mertens) Agardh. Syst. Algar. 71. 1824. Borner 

 and Flahault. Revis. des Nostoc. Ann. Sci. Nat. Bot. 3: 356. 1886. 

 De Toni. Syll. Algar. 5: 610. 1907. 

 Farlow. Marine Algae of New England. 37. 1881. Pike. Check List 

 o£ Marine Algae. Bull. Torr. Bot. Club. 13: 106. 1886. Collins. Algae from 

 Atlantic City, N. J. Bull. Torr. Bot. Club. 15: 310. 1888. Bennett. Plants 

 of Rhode Island. 95. 1888. Martindale. Marine Algae of the New Jersey 

 Coast and Adjacent Waters of Staten Island. Mem. Torr. Bot. Club, i: 

 91. 1889. WoUe and Martindale. Algae. Britton's Catalogue of Plants 

 found in New Jersey. Geol. Surv. N. J. 2: 603. 1889. Collins. Algae. Rand 

 and Redfield's Flora of Mount Desert Island, Maine. 247. 1894; Preliminary 

 Lists of New England Plants. — V. Marine Algae. Rhodora. 2: 41. 1900. 

 Collins, Hoiden and Setchell. Phyc. Bor.-Am. Fasc. 20. no. 957. 1902. 

 Setchell and Gardner. Algae of Northwestern America. Univ. Calif. Pub. 

 Bot. i: 197. 1903. Collins. Notes on Algae. — V. Rhodora. 5: 208. 1903; 

 Phycological Notes of the late Isaac Hoiden. — II. Rhodora. 7: 223. 1905. 



Plate XVI. fig. 14. 



Plant mass sponge-like, porous, fasciculate, hairy on the surface, dull 

 green, widely expanded; filaments 15-18 mic. in diameter, 2-3 mm. in length, 

 erect, flexuous, scarcely thickened at the base, agglutinated into irregular 

 fascicles, sparingly branched; branches often opposite; sheaths thick, firm, 

 lamellose, colorless or brownish; trichomes 8-12 mic. in diameter, tapering 

 into a short hair; cells two or three times shorter than their diameter; 

 hormogones four to six times longer than broad, often developed within the 

 sheath; cell contents olive. 



Maine. Growing in extensive sheets on beams and posts under old tide 

 mill. Harpswell. July 1902; on piles of bridge, outlet of Long Pond. "Rare; 

 the most northern station for this species yet reported." (Collins). Massa- 

 chusetts. On wharves. Wood's Hole. (Farlow). Rhode Island. Newport. 

 (Farlow). Connecticut. On woodwork at or above high water mark. 

 Black Rock; Stratford Shoals; on old hulk. Cook's Point, August, October. 

 (Hoiden). New York. Shores of Long Island: Greenport, Little Egg 

 Harbor. (Pike). New Jersey. On wharves. Atlantic City. (Morse, Martin- 

 dale). Washington. In salt marsh on sticks and old wood. Whidbey 

 Island. August 1899. (Gardner). 



469. Calothrix parasitica (Chauvin) Thuret. Essai Class. Nostochinees. 



Ann. Sci. Nat. Bot. VI. i; 381. 1875. Bornet and Flahault. Revis. 



des Nostoc. Ann. Sci. Nat. Bot. VII. 3: 357. 1886. De Toni. Syll. 



Algar. 5: 612. 1907. 

 Farlow. Marine Algae of New England. 37. 1881. Collins. Notes on 

 New England Marine Algae. II. Bull. Torr. Bot. Club. 10: 55. 1883. Pike. 

 Check List of Marine Algae. Bull. Torr. Bot. Club. 13: 106. 1886. Col- 

 lins, Hoiden and Setchell. Phyc. Bor.-Am. Fasc. 3. no. iii. 1893. Setchell. 



