311 



trychia rivttlaris, possibly distinct from either of the foregoing. 

 Chmoniorpha Picquotiana (Mont.), Kiitz. 



u Limun, Kiitz. It is impossible to draw the Hne between these 

 two species in the Atlantic City specimens. Typical forms 

 of each may be found, and so can every shade between them. 

 Rhtzoclonium ripariiim, Roth. Common. 



Cladophora albida (Hnds.), Kiitz. Beside the type, a plant occurs, 

 which seems to be the C. refracta of Harvey, (Phyc. Brit.,) and 

 is probably a form o^ C. albida, in which Hauck (Deutsch- 

 land's Meeresalgen) includes C. refracta of Harv. and Kiitz. 

 The plant of the New England coast which I take to be the 

 C, refracta of Farlow's Man., is quite distinct. Hauck places 

 the latter as forma refracta In C, hamosa^ Kiitz. 

 C. glaiicescens, Harv. Not uncommon. 

 C, Hiitchmsm^ Kiitz. Not uncommon. Luxuriant specimens 



from Longport, collected by Mrs. Lawton. 

 CladopJtora flexuosa, Harv. A doubtful species, but some speci- 

 mens found at Atlantic City seem to belong here. 

 C. gracilis (Griff), Kutz. Common and variable. 

 C. expansa, Kiitz. Common, especially in marsh tide -pools. 

 Bryopsis phunosa (Kiitz.), Ag. Not uncommon. 

 Phyllitis fascia^ Kiitz. Common. 

 Scytosiphon lomeiitarius, Ag. Common. 

 Pimctaria latifolia, Grev, 

 P^ latifolia, Grev., van Zostcra^, Le Jolis. 



P' plantaginea (Roth.), Grev. AH three forms rather common. 

 Dictyosiphon fceniculaceus, Grev. Common, including forms 



which appear to be var. faccidus, Aresch. 

 ^yriotrichia clava^formis, Harv. 

 ^. clavceformis, Harv., var. filiformis, Farlow. On Scytosiphon 



and Phyllitis, 

 Ectocarpics terminal is, Kiitz. On Zoster a. 

 E^ tomentosus (Huds.), Lyng. Rather common. 

 -c. granulosus, Ag. Not uncommon. 

 E^ confervoides (Roth.), Le Jolis. Very common. 

 E' confervoides, var. silicidosus, Kjellman. ^ Almost as common 

 as the type. 



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