226 Rhodora | NOVEMBER 
C. arcta (Dillw.) Kütz. 245, 266, 298, 308, 314, 785, 914, 1074. 
Seaside Park. Jan., Mar.—May.. 
C. expansa (Mert.) Kütz. 796, 830 = P. B.-A. 121. Brackish 
pond, Cook's Point. Apr. May. “Lives through the winter." 
C. expansa forma glomerata 'Thuret. 1536. Fresh Pond. Aug. 
C. gracilis (Griff.) Kütz. 46, 351, 356, 364, 848, 1374. Cook's 
Point, in muddy pools; Woodmont; Charles Island. June, July. 
C. lanosa (Roth) Kütz. 1498. Charles Island, floating. May. 
C. lanosa var. uncialis (Harv.) Thuret. 37. Stratford Shoal. 
June. 
C. Magdalenae Harv. 1440. Charles Island. Nov. “Forming 
felty mats or turfs on sandy mud, among Spartina, near high water 
mark. Same grows on shore of Seaside Park. A cold weather plant, 
appearing in late autumn (as far as I know).” “Dec. 25. Clado- 
phora No. 1440 was fairly abundant at this time.” 
C. Rudolphiana (Ag.) Harv. 12, 19, 148, 322, 331, 594. Fresh 
Pond, abundant on stones, Ruppia, etc. May, Sept. 
Gomontia polyrhiza (Lagerh.) Bornet & Flahault. 861. In dead 
shells, Bridgeport harbor. Aug. 
Bryopsis plumosa (Huds.) Ag. 57, 383, 624, 649, 675, 847, 1373. 
Penfield Reef; Breakwater; Seaside Park; Woodmont; Pool about 
high water mark, Charles Island. June—Aug. 
Vaucheria litorea Ag. 1173, 1177, 1351. Abundant in very 
brackish pond, Seaside Park. Apr., Dec. 
V. piloboloides Yhuret. 663, 722, 1200. On muddy rocks below 
low water, Black Rock Beacon, July; “On shelly sand bottom near 
westerly extremity of sand bar running into harbor from near Pleas- 
ure Beach House, Alcazar, just below ordinary low water mark, in 
abundant tufts over several square rods.” Sept. 
Pylaiella littoralis (L.) Kjellm. 1447. Cook's Point. Unilocu- 
lar sporangia, Apr. 
Ectocarpus aecidioides Rosenv. 1497. On tips of Laminaria 
Agardhii, Charles Island. May. 
E. amphibius Harv.? 332. On Zostera, and Ruppia Fresh Pond. 
May. 
E. confervoides (Roth) LeJolis. 534, 539, 762, 765. Seaside 
Park, on Fucus, etc. Dec. “No. 762 on stranded stump; cells in 
largest filaments 20-30 p, as long as wide; in ultimate branches 
about 12 4, several times longer than wide. Plurilocular sporangia 
18-30 p wide, 75-125 q long; branching alternate.” 
