rilEFACE. yij 



Enleromorpha inteslinalis, Lyngb.-IIarv. Ncr. Bor^ Am. 3. 50. Providence to Newport. 



Enleroinorpha coiKprfssa, Grev.-Harv. Ner. Bor. Am. 3. 50. Southern Rhode Island. 



Enteroinorpha olathrala, Grev.-IIaev. Ner. Bor. Am. 3. 50. Newport. 



Ulva lalissima, L.-IIarv. Ner. Bor. Am. 3. 59. Providence. 



Ulva lactuca, L.-Harv. Ner. Bor. Am. 3. GO. Providence. 



TelraHporalacunosa, Cn&.w. -YLary. Ner. Bor. Am. 3. 61. T. perforata, Hwi^EX M.is,. Providence. 



Telraspora lubrica, Aa. Providence. 



Batrachosperinum pulcherrinium, Hass. Providence. 



Balrachospermum moniliforme, Roth.-IIarv. Ner. Bor. Am. 3. 03. Providence. 



Ghaelophora endivaefolia, Ag.-Harv. Ner. Bor. Am. 3. 09. Providence. 



Draparnldia glomerata, Ag.-Harv. Ner. Bor. Am. 3. 72. Providence. 



Stigeoclonium minutum, KiJTZ. Providence. 



Cladoplwra riqxstris, L.-Harv. Ner. Bor. Am. 3. 74. Newport. 



Cladophora (jlaucescens, Griff.-Harv. Ner. Bor. Am. 3. 77. Rhode Island. 



Cladoplwra refracta, Roth.-Harv. Ner. Bor. Am. 3 79. Southern Rhode Island. 



CJadopihora Rudolphiana, Ag.-Harv. Ner. Bor. Am. 3. 80. Providence. 



Cladopjhora gracilis, Griff.-Harv. Ner. Bor. Am. 3. 81. Little Conipton. 



Cladophora fracla, Harv. Ner. Bor. Am. 3. 82. Rhode Island, Bailey. 



Chselomorpha serea, Dillw.-IIar. Ner. Bor. Am. 3. 86. Newport, etc. 



Chaetomorpha Olneyi, Harv. Ner. Bor. Am. 3. 86. Little Compton. 



Chselomorpha longiarliculata, Harv. Ner. Bor. Am. 3. 86. Little Compton. 



var. crassior, Harv. Ner. Bor. Am. 3. 86. Little Compton. 

 Chaetomorpha sutoria, Berk.-Harv. Ner. Bor. Am. 3. 87. Newport. 

 Zijgnema mal/ormatum, Hass. 1. 147. Providence. 

 Zi/gnema catenaeforme, Uass. 1. 147. Providence. 



Zi/gnema Thwaitesii, Olney, n. s. Near Z subvenlricosum, Providence. 

 Zygnema longalum, Hass. 1. 151. Providence. 



Zj/gnema striata, Olney, n. s. " Colls evidently striated," Tliwaites. Providence. 

 Tyndaridea bicornis ? Hass. 1. 102. Providence. 

 Tyndaridea insignis? Hass. 1. 103. Providence. 

 Mesocarpus parvulus, Hass. 1. 109. Providence. 

 Mougcolia genujlexa, Ag.-Hass. 1. 173. Providence. 

 Vesicidiferaconcalenata, "B-Ass. 1.201. Providence. 

 Vesiculifera aequalis, Hass. 1. 205. Providence. 

 Vesicidi/era bombycina, Hass. 1. 208. Providence. 

 Vesiculifera Candollii, Hass. 1. 208. Providence. 

 Bulbochaete Tliwaitesii, Oi,ni.y, n. s. Providence. 

 Lyngbya majuscula, Harv. Bor. Am. 3. 101. Providence. 

 Sphaeroplea virescens, Berk. Providence. 

 Sphaeroplea puncialis, Berk. Providence. 

 Tolypothrix distorta, Kutz.-Hass. 1. 240. 



Calothrix confervicola, Ag -Harv. Ncr. Bor. Am. 3. 105. Providence. 

 Calothrix scopulorum, Ag.-Harv. Ner. Bor. Am. 3. 105. Providence. 

 Hyalotheca dissiliens, Brev.-Ralfs. De.s. 51. {Glocopirium.) Providence. 

 Hyalotheca mucosa, Eiirh.-Ralfs. Des. 53. Providence. 

 Didymoprium Grevillii, Kijtz.-Ralfs. Des. 61. Rhode Island, Bailey. 

 Didymoprium Borreri, Ralfs. Des. 58. Rhode Island, Bailey. 

 Desmidium. Swarizii, Aq.-Rai,ys. Des. 61. Throuf,'hout United States, Bailey. 

 Aptogonum Baileyi, Ralfs Des 209. Worden's Pond, Rhode Ishxnd, Bailey. 

 Micrasteiias rotata, Ralfs. Des. 71. Providence. 

 Micrasterias radiosa, Ag. -Ralfs. Des. 72. Maine to Virginia, Bailey. 

 Micrasterias furcala, Ralfs. Des. 73. Worden's Pond, Rhode Island, Bailey. 

 Micrasterias Crux-Melilensis, Ralfs. Des. 73. Maine to Virginia, Bailey. 

 Micrasterias truncata, Vi'RS.\i.-\'<.\\.vs. Des. 75. United States, Bailey. 



