BIOLOGICAL, SURVEY OE WOODS HOLE AND VICINITY. 
813 
Class RHODOPHYCE^E. 
Order BANGIALES. 
Family BangiacM. 
Bangiafusco-purpurea (Dillwyn) Lyngbye. 
Common, attached to stones and woodwork of 
wharves between tide marks. 
Woods Hole: Harbor walls and wharves, Grassy 
ledge on rocks along ship channel, Little Har- 
bor on Government wharves, Juniper Point. 
Spring, summer. 
Farlow, 1873, p. 292, Woods Hole; P. B.-A., fas. 
ii, no. 87, Juniper Point (Butlers Point), Woods 
Hole, July, 1893 (W. A. Setchell). 
Erythrotrichia ceramicola (Lyngbye) Areschoug. 
Common, on Zostera in company with Chantran- 
sia virgatula, occasional on Desmarestia viridis. 
Woods Hole: Grassy Ledge, Eel Pond, Little 
Harbor. Robinsons Hole (I. F. Lewis). 
Spring, summer. 
Erythrotrichia ceramicola — Continued. 
Farlow, 1876, p. 707, Buzzards Bay; Collins, 
1908, p. 134; Robinsons Hole, August, 1907. 
Porphyra laciniata (Lightfoot) Agardh. 
Common, attached to stones and woodwork of 
wharves near low-water mark. 
Woods Hole: Entrance to Eel Pond, Bureau of 
Fisheries wharves, harbor walls, Grassy Ledge. 
At all seasons. 
Farlow, 1873, P- 2 9 2 ( Porphyra vulgaris Agardh), 
Woods Hole. 
Porphyra leucosticta Thuret. 
Common, on Zostera and larger algse. 
Woods Hole : Great Harbor, Little Harbor. Oak 
Bluffs (Cottage City, King). 
Spring. 
Collins, 1884, pp. 131, 132, Oak Bluffs (Cottage 
City, J. D. King). 
Order NEMALIONALES. 
Family Nemalionaceaj. 
Acrochcetium Dasyce Collins. 
Occasional, on Dasya elegans. 
Woods Hole (Collins). 
September 2, 190s (Collins). 
Collins, 1906c, p. 191, Woods Hole, September 
2, 1905, on Dasya elegans. P. B.-A., fas. xxvii, 
no. 1342, Woods Hole, September 2, 1905 (F. S. 
Collins). 
Acrochcetium Daviesii (Dillwyn) Nageli. 
Occasional, on Desmarestia viridis. 
Robinsons Hole (I. F. Lewis). 
August, 1907. 
Collins, 1908, p. 134, Robinsons Hole, August, 
1907. 
Synonym, Chantransia Daviesii (Dillwyn) Thu- 
ret, P. B.-A., fas. xvm, no. 880. 
Acrochcetium minimum Collins. 
Occasional, on Desmarestia viridis. 
Robinsons Hole (I. F. Lewis). 
August, 1907. 
Collins, 1908, p. 133, Robinsons Hole, August, 
1907. 
Acrochcetium secundatum (Lyngbye) Nageli. 
Common, attached to Zostera, Ceramium rubrum, 
Porphyra laciniata, etc. 
Woods Hole: Grassy Ledge, Juniper Point. 
Summer, winter, probably at all seasons. 
Synonym, Chantransia secundata (Lyngbye) Thu- 
ret, P. B.-A., fas. xxii, no. 1088, not no. 236. 
Acrochcetium virgatulum (Harvey) Bomct 
Abundant, fringing Zostera, and occasionally on 
Ceramium rubrum. 
Woods Hole: Eel Pond, Grassy Ledge, Little 
Harbor. 
Summer, probably at other seasons. 
Synonym, Trentepohlia virgatula var. secundata 
(Farlow, 1881, p. 109). 
Chantransia efflorescens var. Thuretii Bomet. 
Occasional, attached to Ceramium rubrum and 
Cystoclonium purpurascens. 
Woods Hole: Off Juniper Point at a depth of from 
1 to 3 meters (Nott). Gay Head (Farlow). 
Summer, July, 1895 (Nott). 
Farlow, 1876, p. 705 ( Chantransia Daviesii Thu- 
ret), Gay Head; Farlow, 1881, p. 109 ( Trente- 
pohlia Daviesii, Harvey), Gay Head, on Cysto- 
clonium purpurascens; Collins, 1896a, p. 5 
( Chantransia corymbifera Thuret), Woods Hole, 
on Ceramium rubrum and Cystoclonium pur- 
purascens (C. P. Nott); P. B.-A., fas. iv, no. 
192 ( Chantransia corymbifera Thuret), Woods 
Hole, July 15 to 20, 1895 (C. P. Nott). 
Nemalion multifidum (Weber & Mohr) J. Agardh. 
Common, attached to rocks between tide marks. 
Woods Hole: Juniper Point, Grassy Ledge. 
Cuttyhunk. Penikese. Gay Head. Black 
Rock. 
Summer, probably at other seasons. 
