72 



MARINE AND FISHERIES 



6-7 EDWARD VII., A. 1907 



localities, Alaria esculenta on Cranberry rock only. Desmarestia viridis was common 

 both in dredged material and cast up on the shore, 'ChordMria flagelliformis somewhat 

 less so, while Desmarestia aculeata was rather rare. Castagnea v'irescens was but 

 once obtained, but the filaments, when examined microscopically, were found to be 

 densely crowded with spores, and very beautiful. 



Elachista fucicola was extremely common throughout the month; Leathesia dif- 

 formis, always scarcer, became rare after the first fortnight. A single imperfect speci- 

 men of Chcetopteris plumosa occurred in plankton. 



Ectocarpus was represeinted by six species and varieties, including E. Chordarice 

 and E. reptans, the former growing upon Ohelia, the latter upon Chorda. The organ- 

 ism, however, which usually composed the brownish tufts upon the piles of the wharves, 

 was not one of these, but a diatom, Navicula mollis, numerous individuals of which 

 were inclosed within tubes of mucilage, thus forming a false filament. 



The Chlorophycew were less carefully studied, and the list is believed to be some- 

 what incomplete. Six species of Cladophora were determined, obtained chiefly from tide 

 pools. A few filaments only were seen of Chcetomorpha Picquotiarta, though upon one 

 occasion a considerable quantity was found of a plant, which, rather resembling 

 Cladophora in general appearance, seemed never to branch, and answered well to the 

 description of Chcetomorpha longiarticulata. The filaments were much more slender 

 and less wiry then those of the other species of this genus, and it was probably a 

 Rhizoclonium. 



The blue-green algse listed were found as detached filaments, while examining 

 higher forms, no special effort being made to collect them. 



It will be noticed that while Ptilota, Euthora, and Delesseria sinuosa, usually con- 

 sidered amongst the most beautiful red algse of north-eastern America, are common, 

 Chondrus and Bhodymenia, the more useful genera of this group, are unusually scarce. 

 On the other hand, nearly all the brown algae of commercial importance may be had in 

 considerable quantities. 



Prof. Farlow very kindly named for me some species about which I was in doubt, 

 and to him and to all of the gentlemen with "whom I had the privilege of working at the 

 station, my most grateful thanks are due for assistance and helpful suggestions. 



The following is a detailed list of the species observed : — 



SCHIZOPHYTA. 



SCHIZOPHYCE^ (CYANOPHYCE^). 



Hormogonece. 



Oscillatoriaceos. 

 Spirulina sp. 



Oscillatoria subuliformis Harv. 



O. subtorulosa (Breb.) Farlow. 



O. sp. 



N'ostocaceoe. 



Sphserozyga Carmichaelii Harv. 



Bivulariacece. 



Calothrix confervicola Ag. 



0. Crustacea (Schousb.) Born, Thur. 



