82 F- Borgesen. 



14. С. pseudoprotuberans Kirchner, Alg. Schles. p. 150. 



Børgesen, Ferskvandsalg. Østgrønland, p. 18, tab. 1, fig. 12 ^Hekla Havn). 

 Larsen, Freshw. Alg. East Greenl., p. 88 (Атака). 



Forma isthmo latiore Børgs. 1. с. 



A few specimens like this form were found in Vester Elv. 



Long. = 38 fji; lat. = 30. 



I^oc. Danmarks Havn. 



15. С. pulcherrimum Nordst., Desm. Brasil., p. 213, tab. 3, fig. 24. 

 ß boréale Nordst., Desm. Spetsb. p. 32, tab. 6, fig. 14. 



A few specimens were found in collections from Vester Elv and 

 Lille Snenæs. 



Long. = 54 /^; lat. = 39//. 



Loc. Danmarks Havn, I.illc Snenæs. 



16. С. quadratum Ralfs in Ann. Mag. Nat. Hist. p. 395, tab. 11, 

 fig. 9; Brit. Desm., p. 92, tab. 15, fig. 1 a. 



Boldt, Desm. Grønl., p. 10 (Kung Oskars hamn). 



Børgesen, Ferskvandsalg. Østgrønland, p. 20 (Hekla Havn, Røde 0). 

 Larsen, Freshлv. Alg. East Greenl. p. 88 (in several localities from Kordlortok 

 65'' 40' to Sabine 74° 30'). 



Forma Willei West, Monograph. Brit. Desm., vol. Ill, 

 p. 59, C. quadratum Ralfs forma "Semicellulæ lateribus 

 nonnumquam latissime rotundatis 1. rectis, nee retusis" 

 W^ille, Ferskvandsalg. Nov. Semlja, p. 37, tab. XII, 

 fig. 20 et forma "major" ibidem fig. 21. 



The form found had a somewhat thinner membrane 

 than Wille's. (Fig. 3). Compare "Forma semicellula 

 Fia. 3. С quadra- ^^ apice magis rotundata quam in forma typica", 

 fum Ralfs, forma Borge, Sib. Chlorophyllophycé-Fiora, p. 12, fig. 6. 



Willei West Long _ 57_67 и ; lat. = 35—38 и ; lat. isthm. = 28 a. 



I^oc. Vester Elv, Hvalrosodde. 



17. С. reniforme (Ralfs) Archer in Journ. of Bot. 1874, p. 92. 

 Cosm. margaritiferum Menegh. var. reniformis Ralfs, Brit. Desm. 

 p. 100, tab. 16, fig. 2 a. 



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



A few specimens of this species were found in Vester Elv. 



Long. == 50 // ; lat. = 47 «. 



Loc. I^anmarks Havn. 



18. С. speciosum Lund., Desm. Suec. p. 34, tab. Ill, fig. 5. 

 var. biforme Nordst., Desm. Spetsb. p. 30, tab. VI, fig. 11. 



Boldt, Desm. Grønl., p. 20 (Kung Oskars hamn). 

 Børgesen, Ferskvandsalg. Østgrønland, p. 15 (Køde 0). 

 Larsen, Freshw. Alg. East Greenl., p. 88 (Sabine 0). 



