[405] THE ALG^ 169 



Cosmarium pseudogranatum Nordst. (Plate xliii, fig. 21.) 

 In a freshwater pond, Popof Island. 

 Diameter 35 /x, length 51 /x. 



Cosmarium botrytis Menegh. (Plate xliii, fig. 11.) 

 In freshwater, Popof Island. 

 Diameter 35-43 /x, length 40-52 /x. 



Cosmarium conspersum Ralfs. (Plate xliii, fig. i.) 

 In a freshwater pond, Cook Inlet (424) . 



Cosmarium caelatum Ralfs. (Plate xliii, fig. 2.) 



In a freshwater pond, Glacier Bay ; only one specimen seen. 

 Diameter 40-45 ij.. 



Cosmarium portianum nephroideum Wittr. (Plate xliii, figs. 12, 



13.) 

 Freshwater pond, Seldovia, Cook Inlet. 



Diameter 21 /^, length 32 ^; isthmus 9 [i broad; sinus 5 ix wide. 



The verrucae are short, absent from the sinus. 



Cosmarium ochtodes Nordst. (Plate xliii, fig. 10.) 

 In a freshwater pond near Seldovia, Cook Inlet. 

 Diameter 64 //, length 97 [i. 



Cosmarium intermedium Delp. (Plate xliv, fig. i.) 



In a freshwater pond near Seldovia, Cook Inlet. 



Diameter 74 /z, length 66 /x, isthmus 1 2 /x wide. The plant is cov- 

 ered all over with large pearly granules. 



Cosmarium subcrenatum Hantzsch. (Plate xliii, fig. 20.) 

 In freshwater ponds. Glacier Bay ; Kukak Bay. 

 Diameter 26-30 /x, length 35-40 /x. 



Cosmarium phaseolus Br^b. (Plate xliv, fig. 8.) 

 In freshwater near Seldovia, Cook Inlet. 

 Diameter 24 /x, length 27 [i.\ sinus 3 (i broad; isthmus 4 tx broad. 



Cosmarium costatum Nordst. 



In freshwater near Virgin Bay, Prince William Sound. 

 Diameter 40 [i. 



Cosmarium pulcherrimum Nordst. (Plate xliii, figs. 18, 19.) 

 In freshwater near Kukak Bay. 

 Diameter 38 /x, length 52 /x. 



Cosmarium quadrifarium Lund. (Plate xliii, fig. 22.) 

 In freshwater near Virgin Bay, Prince William Sound. 

 Diameter 33 /x, length 40 /x. 



