10 E 



Canadian Arctic Expedition, 1913-18 



Collected by Johansen among algae growing on stones in the river bed 

 at Bernard harbour, on August 16, 1915; in Jessup's collections from lakes 

 on Old Crow river flats, 40 miles north of New Rampart House, on July 3, 1911, 

 and lakes on Old Crow river flats, 60 miles north of New Rampart House, on 

 July 11, 1911. 



Monostyla hamata Stokes. 



A few specimens in Jessup's collections from lakes on Old Crow river flats, 

 40 miles north of New Rampart House, on July 3, 1911; two lakes on Old 

 Crow river flats, 55 miles north of New Rampart House, on July 10, 1911; 

 ponds on Old Crow river flats, 60 miles north of New Rampart House, on 

 July 11, 1911. 



Monostyla bulla Gosse. 



This species was found in small numbers in Jessup's collections from lakes 

 on Old Crow river flats, 40 miles north of New Rampart House, on July 3, 1911. 



Monostyla closterocerca Schmarda. 



Monostyla closterocera MURRAY, Journ. Royal Micr. Soc., 1913, p. 357, pi. 

 15, fig. 39. 



A few specimens in Jessup's collections from lakes on Old Crow rive;* 

 flats, 60 miles north of New Rampart House, July 11, 1911. 



Monostyla crenata Harring. 



Collected by Jessup in two lakes on Old Crow river flats, 55 miles north 

 of New Rampart House, July 10, 1911; not common. 



Monostyla lunaris Ehrenberg. 



Abundant and widely distributed in the Arctic. It was collected by 

 Johansen among algae growing on stones in the river bed at Bernard harbour, 

 on August 16, 1915; by Jessup in a muskeg lake, 28 miles north of New Ram- 

 part House, on June 25, 1911; lakes on Old Crow river flats, 40 miles north of 

 New Rampart House, on July 3, 1911; lakes 48 miles north of New Rampart 

 House, on July 7, 1911; two lakes on Old Crow river flats, 55 miles north of 

 New Rampart House, on July 10, 1911; ponds on Old Crow river flats, 60 miles 

 north of New Rampart House, on July 11, 1911; small muddy pool, 25 miles 

 north of New Rampart House, on July 17, 1911; slough of Old Crow river, 

 near New Rampart House, on August 7, 1912. 



Monostyla cornuta (Mtiller). 



A few specimens collected by Johansen in the lake south of Bernard harbour, 

 on May 21, 1916; by Jessup in a pond near New Rampart House, at the Inter- 

 national Boundary and Porcupine River, on June 12, 1911. 



Lepadella ovalis (Miiller). 



Lepadella ovalis HARRING, Proc. U. S. Nat. Mus., vol. 51, 1916, p. 537, 

 pi. 89, figs. 4-10. 



Collected in small numbers by Jessup from lakes on Old Crow river flats, 

 40 miles north of New Rampart House, on July 3, 1911; two lakes on Old 

 Crow river flats, 55 miles north of New Rampart House, on July 10, 1911; 

 pools at Fort Yukon, May 24, 1912. 



