Arkiv för botanik

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Diploneis littoralis DONK. B. D. Tab. 1 f. 2. - . II. Syn. Suppl. . f. 25. f. hybrida nob.

As an intermediate form et ween his species and D aestiva I might considor a Diploneis that is 40 . in tength, 20 1 in breadth, an has narro surrows, very lightly Widen edround the centra nodule that is longate i. The costae are in I p. an alternate illi apparenti single row of very fino lineolae. Foss. Kk. KnjASha, rare. Dis tr of the main form mar. Arctio ea, ubiquis t.

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les marine.

Smithii var borealis f. major GRUN. FranZ.-JOS. L. D. Tab. I. f. 40.

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it is difficult to distinguisti by an other character than hoobsolet punctuation. Mirs thought it possibi identio illia Diplo=reis figured by M OSΤRUP in Danshem Tab. 1 f. 17 p. 24 an determine tot borealis GRUN. utrili striationo tho lati0 boin that o D. Smithii tho tW formes mustbo difforent. The fori of M OSTRU is also ather differsntfrom tho largo and typicat . borealis GRUN. that is presenι

Naviculae orthosti etiae L.

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The Danisti form is perhaps identicat illi avicula und-

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Navicula Micro stigmaticae L.

in I l . .

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linear.

Cynibella G.

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large, orbicular contra area.

and ais to a dorsali more arcuato form intermediate et Neen Encyonem prostratum an E caespitosum, draWn in

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mandi an Var. achyclada.