Myxophyceae 287 



r888. (R. h o s p i t a Thur.). Martindale. Marine Algae of the New Jersey 

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

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

 found in New Jersey. Geol. Surv. N. J. 2: 604. 1889. Collins, Holden and 

 Setchell. Phyc. Bor.-Am. Fasc. 21. no. 1015. 1903. 



Plate XX. fig. s, 6. 



Colonies up to 3 cm. in diameter, at first hemispherical, pulvinate, gre- 

 garious, finally becoming bullate, hollow, soft, dull blackish green; sheaths 

 wide, lamellose, ocreate, funnel-shaped, dilated, the outer layers confluent 

 into an amorphous gelatin, becoming yellowish brown with age; trichomes 

 4-5 mic. in diameter in lower portion, above 8-13.5 mic. in diameter, some- 

 what constricted at joints, tapering into a thick hair; lower cells about twice 

 as long as their diameter, upper cells twice as short as the diameter. 



New Jersey. On roots of Spartina and on oyster shells. (Morse). 

 Florida. On pneumatophores of the black mangrove (Avicennia niti- 

 d a), just above low water mark. Key West. October 1902. (Howe). 



523. Rivularia nitida. Agardh. Dispositio Algarum Sueciae. 44. 1817. Bornet 

 and Flahault. Revis. des Nostoc. Ann. Sci. Nat. Bot. VII. 4: 357. 

 1887. De Toni. Syll. Algar. 5: 661. 1907. 



Farlow. Marine Algae of New England. 38. 1881. (Rivularia p 1 i- 

 cata Carm.). Pike. Check List of Marine Algae. Bull. Torr. Bot. Club. 

 13: 106. 1886. Martindale. Marine Algae of the New Jersey Coast and 

 Adjacent Waters of Staten Island. Mem. Torr. Bot. Club, i: 91. 1889. 

 Collins. Algae. — Rand and Redfield's Flora of Mount Desert Island, Maine. 

 247. 1894. Collins, Holden and Setchell. Phyc. Bor.-Am. Fasc. 6. no. 260. 

 1897. Collins. Preliminary Lists of New England Plants. — V. Marine 

 Algae. Rhodora. 2: 43. 1900. Tilden. American Algae. Cent. VI. no. 571. 

 1902. Setchell and Gardner. Algae of Northwestern America. Univ. Calif. 

 Pub. Bot. 1 : 198. 1903. Collins. Phycological Notes of the late Isaac Hol- 

 den. — II. Rhodora. 7: 224. 1905. 



Colonies up to 3 cm. in diameter, spherical or expanded, plicate-corru- 

 gate, soft, hollow, olive green; filaments crowded; sheaths close, narrow, 

 scarcely distinct, in the lower portion of the filament expanded, transparent 

 or yellowish brown; trichomes 2-5 mic. in diameter, cylindrical, ending in 

 a very thin, very long hair; lower cells three or four times longer than 

 their diameter, upper cells shorter; cell contents olive. 



Alaska. On mud near high water mark. St. Michael. (Setchell). Can- 

 ada. In stream attached to roots of higher plants. Minnesota Seaside Sta- 

 tion, Port Renfrew, Vancouver Island, British Columbia. July 1901. (Leavitt 

 and Crosby). Nova Scotia. (Collins). Maine. On woodwork, rare. 

 (Collins). New Hampshire. (Collins). Massachusetts. On mud and 

 Spartina roots. Cohasset Narrows; Wood's Holl. (Farlow). On wood- 

 work. Wellington, Medford. October 1892. (Collins). On roots of Spar- 

 tina. Quamquisset Harbor, Falmouth. July and August 1891. (Setchell). 

 Rhode Island. (Collins). Connecticut. On bank of outlet. Fresh Pond. 

 July to September. (Holden). New York. Prince's Bay, Staten Island; 

 shores of Long Island, Jamaica Bay, Canarsie. (Pike). 



