b P. T. CLEVE, DIATOMS FROM FRANZ JOSEF LAND. 



G. parvulum Kutz. — Some few specimens from Cape 

 Flora, resembling G. Lagenula V. H. Syn. XXV, 8. — L. 0,032; 

 B. 0,01 mm. Str. 17 in 0,oi mm. 



Navicula minuscula GtRUN. — Spariugly in some specimens 

 from Cape Flora, West Point. — L. 0,oi6; B. 0,oo6 mm. 

 Strife very fine. 



N. cocconeiforniis GtREG. — Rare in some sample. 



N. cryptocephala var. veneta Kutz. — L. 0,0.3; B. 0,oo7 mm. 

 Strise 18 in 0,oi mm. 



N. himgarica v. capitata £hb. — Sparingly in several 

 samples. 



N. cinda Ehb. — Rather common. — L. 0,022; B. 0,oo.5 mm. 

 Stria3 14 in 0,oi mm. — Some specimens bear a elose re- 

 semblance to N. costulata and it seems questionable whether 

 these two forms really are distinct species. 



N. gracilis Ehb. — Not rare in one sample from Bell Isle. 



N. anglica Ralfs v. minut a Cl. — L. 0,oi8; B. 0,oo8 mm. 

 Str. 18 in 0,01 mm. — Sparingly in some samples. 



N. ampliihola Cl. — Sparingly in some specimens. 



Pimiularia gracillhna GrREa. — Cape Flora, rare. — L. 0,o3; 

 B. 0,004 mm. Str. 20 in 0, 01 mm. 



P. leptosoma (tRUN. — L. 0,032; B. 0,oo6 mm. Str. 18 in 

 0,01 mm. — Sparingly in several samples. 



P. suhcapifata Greg. — L. 0,032; B. 0,oo5 mm. Str. 12 

 in 0,01 mm., reaching to the median line (= N. Hilseana). — 

 Rare in some samples. 



P. interrnpta AY. Sm. var. hiceps. — Not rare in most 

 samples. — L. 0,o5; B. O,oii mm. Str. 12 in 0,oi mm. 



P. 7nesolepia Ehb. — Rare. 



P. microstauron Ehb. — Not common. 



P. åivergentissima Grun. — Rather common. 



P. Bréhissonii KtJTZ. — Common. — L. 0,036; B. 0,oi mm. 

 Str. 11 in 0,01 mm. 



P. divergens W. Sm. — Rather common. — The most 

 freqnent form belongs to var. eUiptica Grun. 



P. intermedia Lgt. — Very common. — L. 0,04; B. 0,oo7 mm. 

 Str. 8 in O.oi ram. 



P. Balfoureana Grun. — Bell Isle, sparingly. — L. 0,oi6; 

 jB. 0.005.5 mm. Str. 11 in 0, 01 mm., ver^^ short. 



P. horealis Ehb. — Common. 



P. lata Bréb. — Not common and very variable. 



