DICKIE, FRESHWATER ALGiE. 281 



collection, gathered " close to highwater-mark in freshwater 

 ^' pools, visited by the spraj, at Christianshaab, August ; and 

 *' dried-up pools near the sea, Jakobshavn, June. The large 

 " form, var. /3, in freshwater pools, Egedesminde, &c.* The 

 plant varies considerably in size. In places only partially moist, 

 it is small ; and when superficially examined in the dry state, it 

 might be mistaken for the large forms of P. crispa. This error 

 I committed in a list of species collected by Dr. P. C. Sutherland 

 in the summer of 1852.t It is reported, on the authority of Vahl, 

 as a native of Spitzbergen. Mr. Brown's specimens comprehend 

 various stages. At first it is linear with narrow stripes, subse- 

 quently oblong-ovate with undulate and crenate margin, and finally 

 very broad and irregular in outline. 



2. Enteromorpha compressa^ Linn. 



The specimens might be referred to the smaller and simpler 

 forms of this variable species. "Jakobshavn (June), in a rock 

 " pool within highwater-mark ; but the same pools during slack 

 " water fill by influx of freshwater streams, so that the plants grow 

 " half the time in fresh, and the other half among salt water." — R.B. 



3. E. percursa, J. Ag. 



'' Lyngemarken, Disco Island (September) ; and a few specimens 

 mixed with Prasiola Jluviatilis, at Jakobshavn, in slightly brackish 

 pools, out of reach of the tide, but visited by sea spray, June 

 1867."— R. B. 



Confer vACEiE. 



4. Conferva bombycina^ Ag. 



" Stagnant pools of fresh water, among the rocks near the sea, 

 Jakobshavn, Egedesminde, and Lyngemarken (July, June, and 

 September)."— R. B. 



5. C.Jioccosa, Ag. {^Microspora floccosa, Kutz.) 



The specimens are not in very good condition, but cannot be 

 referred to in any other genus or species. "■ Pools of fresh water 

 ** near the sea, Jakobshavn (July), and Egedesminde (June)." — 

 R.B. 



IjLOTHRICACEiE. 



6. Ulothrix mucosa, Thunb. 



There are only two small specimens, which, however, may be 

 referred to this species. " Moist places near running water, 

 '* Egedesminde (June), and in streams, Jakobshavn (June)." 



7. r/. minutula, Kutz. ? 



Certainly distinct from the former, judging from the diameter 



* Many of the marine Algae were encrusted with various Foraminifera, 

 Polyzoa, and other Zoophytes. Among the latter were observed Cellepora 

 pumicosa, C. ramulosa, Cellularia reptans. Crista eburnea, Flustra avicu- 

 laris, Tuhulipora patina, Tuhiilaria indivisa, &c. 



f Appendix to Inglefield's " Summer Search for Sir John Franklin," 1853. 



