486 KEY TO THE HIGHER ALGÆ OF THE ATLANTIC COAST. 
n.? Somewhat coarser, with shorter joints: plumules distichous, . 134 
O.” Slender, ate aie oo at once from other Callith- 
-like chains of fruit (seirospores) : com- 
often gree ey (Formerly and perhaps more properly 
considered as the type of a separate genus, as Seirospora 
siana Harv.), 
oO.” apes sepa’ bichehen ending in little corii of 
bran 
p? ibraccuiins pectnats, secnid, aed on the opel side only 
of branches: a beautiful and rare little species: specimens 
of whieh were found at Penikese in 1873, Ba Miss Susan 
Bow eer oo 
p: aitse siniple, vubulibe, $ viiei eiiie T 14a 
p.” Branchlets, or some of them in efoute; pinna . 143 
p.? Without eire characters; branchlets ene pinnate, or ‘bie 
pinna ae 
q.? Joints ere ‘tines as a long as broad: “brilliant: PRSA et up 
.” Joints shorter: less commo hes 
r.” Forming a dense purple ge on Zpaterk: branched tong se 
cun ‘ X 148 
Yr.” Forming AR patches on dike teenies lope erec ct, ent 147 
r.’ Forming velvety tufts on Dasya: branches bud-like, secund, - 
r.* Forming a fleecy, pink-down on Ceramium rubrum: brane nch 148 
spreading, curved: frequent, . ae 
54. ODONTHALIA DENTATA Lyngby. Maine wer oe 3-12. 
55. A DASYPHYLLA Agardh. Coast. 
56. CHONDRIA BAILEYANA Montagne. Coast. 
57. CHONDRIA TENUISSIMA Agardh. Boston to ae York. 4-5. í 
58. CHONDRIA ATROPURPUREA Harvey. South Carolina and South. 4-10. 
59. RHODOMELA SUBFUSCA Agardh., New Jersey and North. 
60. R GRACILIS Kiitzing. Massachusetts and North. 4-12 
61. Harvey. New Jersey to Massachusetts. 4-8. 
62. POLYSIPHONIA URCEOLATA Greville. Virginia and N 1 
63. ONIA FORMOSA Suhr. New Jersey and North. 4%. “al 
64. POLYSIPHONIA SUBTILISSIMA Montagne. New Jersey and North 
65. LYS NIA OLNEYI Harvey. Long Island and North 2 
66. POLYSIPHONIA HARVEYI Bailey. Boston to New 4 
67. POLYSIPHONIA ELONGATA Greville. Massachusetts, etc. 6-12 Pr 
68. POLYSIPHONIA FIBRILLOSA Greville. New assachusett 
69. POLYSIPHONIA VIOLACEA Greville. Ne hk 
70. POLYSIPHONIA VARIEGATA rdh 
T1. POLYSIPHONIA PARASITICA Greville. are ie etc. a Bo 
72. PoLys NIA ATRORUBESCENS Greville. Logs Jersey to Rhode 1 
73. LYSIPHONIA NIGRESCENS oor ark 
74. POLYSIPHONIA AFFINIS Moo Coa 2 
75. POLYSIPHONIA FASTIGIATA Gein Mes Tork to Halex 1. 
76. BOSTRYCHIA RIVULARIS Harvey. New York to Florida. i 
Ti. DASYA ELEGANS Agardh. Cape Cod and Sou 
78. CHAMPIA LA Harvey. Cape Cod South. 2-4 
79. CORALLINA OFFICINALIS L. New Jersey and Nor n 
80. MELOBESIA PUSTULATA Lamouroux. Rhode Island, eto. Melobesis?) 
81. NULLIPORA PO 2 
LYPHYLLAMEA (?). New York and North. (A- 
