Myxophyceae 53 



Collins. Notes on New England Marine Algae. V. Bull. Torr. Bot. 

 Club. 18: 335. 1891; Algae.— Rand and Redfield's Flora of Mount Desert 

 Island, Maine. 249. 1894. Collins, Holden and Setchell. Phyc. Bor.-Ani. 

 Fasc. I. no. i. 1895. Collins. Preliminary Lists of New England Plants, — 

 V. Marine Algae. Rhodora. 2: 41. 1900. Saunders. The Algae. Harriman 

 Alaska Expedition. Proc. Wash. Acad. Sci. 3: 397. 1901. Setchell and 

 Gardner. Algae of Northwestern America. Univ. of Calif. Pub. Bot. i: 182. 

 1903. 



Plate III. fig. 13-15- 



Colonies forming a cushion-like expansion of a somewhat spherical 

 mass; sheaths delicate; cell.s, 4-24 mic. in diameter, 15-30 mic. in length, 

 cylindrical-oblpng, club-shaped or spatulate, closely packed, laterally com- 

 pressed; cell contents homogeneous, deep blue-green or green, becoming 

 bluish, olive or brownish; gonidia arranged in a single row in the small 

 cylindrical gonidangia or in several rows in the larger gonidangia. 



Alaska. Abundant on Sphacelaria. From Puget Sound to the 

 Shumagin Islands. (Saunders). New England. Grows quite abundantly 

 in spring on the coast, on the older part of the fronds of Polysiphonia 

 fastigiata. (Collins). Maine. On Polysiphonia fastigiata. 

 Near Seal Harbor. (Collins). Connecticut. (Collins). Massachusetts. 

 On Polysiphonia fastigiata, between tides. Little Nahant. April 

 1891. (Setchell). Rhode Island. (Collins). 



118. Dermocarpa (?) rosea (Reinsch) Batters. Marine Algae of Berwich. 



141. 1889. Reinsch. Contrib. Algol, et Fungol. i: 18. pi. 26. f. 4. 

 a-c. 1875. (Sphaenosiphon r o s e u s Reinsch). De Toni. 

 Syll. Algar. 5: 130. 1907. 

 Farlow. Marine Algae of New England. 61. 1881. 



Plate III. fig. 16-18. 



Colonies 2-5 cm. in diameter, indefinitely expanded; tegument thick, 

 gelatinous, hyaline, surrounding the cells; individual sheaths distinct, some- 

 what thick; cells 4-5 mic. in diameter, ovoid-elliptical, loosely arranged; 

 cell contents homogeneous, rose-colored. 



Newfoundland. On zoophytes. Coast of Labrador. (Reinsch). 



119. Dermocarpa violacea Crouan. Note sur quelques Algues Marines 



nouvelles de la rade de Brest. Ann. Sci. Nat. Bot. IV. 9: 70. pi. 



3. f. 2. A-D. 1858. De Toni. Syll. Algar. 5: 129. 1907. 

 Collins, Holden and Setchell. Phyc. Bor.-Am. Fasc. 12. no. 556. 1899. 

 Collins. Preliminary Lists of New England Plants, — V. Marine Algae. Rho- 

 dora. 2: 41. 1900. 



Plate III. fig. ig-2i. 



Colonies indefinitely expanded or forming patches, rose-red; sheaths 

 thin; cells 8-28 mic. in diameter, oval to wedge-shaped; cell contents rose- 

 red to violet. 



New England. On Enteromorpha intestinalis. In company 

 with Lyngbya lute a, Amphithrix violacea, etc. (Collins). 



