Dr. A. Schmidts Diatom -Atlas. 



410 



20 19 



16 



IS 



17 



15 I 



25 26 27 28 



21 22 23 24 



38 39 



35 36 37 



40 41 



33 3^t 



15 \\ 1-5 



12 



11 10 



42 43 44 



nx 



63 



62 61 60 59 5g 57 



<jcz v Fr Hu^tedt 



^ 50 



52 51 



