[405] THE ALG^E 169 



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

 In a freshwater pond, Popof Island. 

 Diameter 35 /*, length 51 p. 



Cosmarium botrytis Menegh. (Plate XLIII, fig. n.) 

 In freshwater, Popof Island. 

 Diameter 35-43 A*, length 40-52/4. 



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 PL. 



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



130 



Freshwater pond, Seldovia, Cook Inlet. 



Diameter 21 /*, length 32 //; isthmus 9 fi broad; sinus 5 fj. wide. 

 The verrucas 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 fi. 



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



In a freshwater pond near Seldovia, Cook Inlet. 



Diameter 74 //, length 66 /*, isthmus 12 p. 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 2630 ju, length 3540 /*. 



Cosmarium phaseolus Br6b. (Plate XLIV, fig. 8.) 

 In freshwater near Seldovia, Cook Inlet. 

 Diameter 24 p, length 27 y. ; sinus 3 /* broad; isthmus 4 fi broad. 



Cosmarium costatum Nordst. 



In freshwater near Virgin Bay, Prince William Sound. 

 Diameter 40 /*. 



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

 In freshwater near Kukak Bay. 

 Diameter 38 /*, length 52 JJL. 



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

 In freshwater near Virgin Bay, Prince William Sound. 

 Diameter 33 ^, length 40 /*. 



