List of Freshwater Algæ. 79 



Cosmariuni (Corda) Ralfs. 

 1. C, bioculatum Bréb., in Ralfs, Brit. Desm. p. 95, tab. 15, fig. 5. 



Boldt, Desm. Gronl , p. Ki (Kung Oskars hamn). 



Børgesen, Ferkvandsalg. Østgrønland, p. 18 (Røde 0, Hekla Havn). 



Larsen, Freshw. Alg. East Greenland, p. 88 (Kap Borlase Warren. Sabine Øl 



A form agreeing well with that mentioned by Nordstedt, Desm. 

 arct., p. 20, tab. 6, fig. 8 was found in Vester Elv. 



Long. = 2'èu\ lat. = 27/^; lat. isthm. 9//. 



Loc. Danmarks Land. 

 2. C. Botrytis (Bory) Menegh., Synops. Desm. p. 220. 



Boldt, Desm. Gronl , p. 28 (Kung Oskars hamn). 



Børgesen. Ferskvandsalg. Østgrønland, p. 13 (Hekla Havn, Danmarks ØJ. 

 Larsen, Freshw. Alg. East Greenland, p. 83 in several localities from Kordlortok 

 (65° 40')— Kap Borlase Warren (74° 1'). 



Some few specimens were found in collections from Vester Elv. 

 Loc. Danmarks Havn. 



3. C. conspersum Ralfs, Brit. Desm., p. 101, tab. 16, fig. 4. 

 ß rotundatum Wittr., Skandin. Desm., p. 13, tab. I, fig. 4. 



Børgesen, Ferskvandsalg. Østgrønland, p. 13 (Hekla Havn, Røde 0). 



Larsen, Freshw. Alg. East Greenland, p. 84 (Jameson Land, Kap Borlase Warren). 



A form rather near that mentioned by Boldt (Desm.Grønl. p. 26, 

 tab. 2, fig. 27) was found in a collection from a small lake at Hvalrosodde. 

 Long. = 80 «; lat. = 65/^ ; lat. isthm. = 24«; crass. = 39//. 

 Loc. Hvalrosodde. 



4. C. crenatum Ralfs, Ann. Nat.' Hist., vol. 14, p. 394, tab. 11, 



fig. 6; Brit. Desm., p. 96, lab. 15, fig. 7. 



Boldt. Desm. Grønl., p. 18 (Kung Oskars hamn). 

 Børgesen, Ferskvandsalg. Østgrønland, p. 14 (Hekla Havn). 



Forma "Crenæ laterales 3", Nordstedt, Desm. Spetsberg. p. 30, 

 tab. 6, fig. 7. 



One specimen was found in Vester Elv. 



*costatum Nordstedt, Desm. Spetsberg, p. 30, tab. 6, fig. 9. 



Long. = ^\ fjt. 



Found in the same locality. 



Loc. Danmarks Havn. 



5. C. cyclicum Lund., Desm. Suec, p. 35, tab. 3, 

 fig. 6. 



* arcticum Nordst., Desm. Spetsb., p. 31, tab. 6, 

 fig. 13. 



Fig. 1. C. cycZiCH/H Lund. 

 Børgesen, Ferskvandsalg. Østgrønland, p. 15 (Hekla Havn). . ' .. ^, , . ,,.„, , 

 T c- I ti u^ w 1 Q4 /A I c II <■• i^ arc//cum Nordst. -'"Il . 



Larsen, rreshw. Alg. East Greenl. p. 84 (Amaka, ralketjæld. 



Kingorsuak, Kap Dalton, Liverpool Kyst in Hurrj' Inlet, Sabine 0). 



This species was absolutely the most common in the collections 



