CLXIII. ALG^. 



C T, wk;i-»- — 



945. Pleurot-enium cristatum, Borge (x 740). (After Borge.) 



946. P. Stuhlmannii, Schmidle (x 405). (After Borge.) 



951. Cosmarium perforatum, Lund. (After Lundell.) 



952. C. subspeciosum, Nordst., var. validius, Nordst. (x 570). 



Nordstedt.) 



953. C. latum, Brcb. (After Cooke.) 



954. Micrasterias denticulata, Ralfs., var. notata, Nordst. 



Nordstedt.) 



955. Staurastrum pseudosebaldi, Wille., subsp. tonsum, Nordst. 



Nordstedt.) 



956. S. dilatatum, Ehrcub., var. obtusilobum, De Not. (After Nordst.) 



(After 



(After 

 (After 



