THE ALG^ 405 



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

 In a freshwater pond, Popof Island. 

 Diameter 3^ //, length 51 p.. 



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

 In freshwater, Popof Island. 

 Diameter 35-43 ,«, length 40-52//. 



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—41^ [m. 



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



Freshwater pond, Seldovia, Cook Inlet. 



Diameter 21 ,u, length 32 /i ; isthmus 9 /jt broad; sinus 5 [j. wide. 

 The verruciE 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 /-t. 



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



In a freshwater pond near Seldovia, Cook Inlet. 



Diameter 74 /i, length 66 n, isthmus 1 2 // 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 /i, length 35—40 //.. 



Cosmarium phaseolus Breb. (Plate xliv, fig. S.) 

 In freshwater near Seldovia, Cook Inlet. 

 Diameter 24 //, length 27 fi ; sinus 3 fx broad; isthmus 4 /x broad. 



Cosmarium costatum Nordst. 



In freshwater near Virgin Bay, Prince William Sound. 

 Diameter 40 /j. 



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

 In freshwater near Kukak Bay. 

 Diameter 38 //, length 52 /x. 



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

 In freshwater near Virgin Bay, Prince William Sound. 

 Diameter 33 ,a, length 40 /j.. 



