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DESCRIPTION OF PLATES XXVIII AND XXIX. 
Illustrating Mr. Davie’s paper on Peranema and Diacalpe. 
Figs. 1-3, 5-2 t, are of Peranema cyatbeoides. 
Figs. 22 and 23 are of Diacalpe aspidioides. 
Figs. 1, 2, 3, and 7 are freehand drawings. Fig. 4 is a diagrammatic representation of leaf-gaps 
and the subtending leaf- traces in various dictyosteles. Figs. 5, 6, 8-23 have been drawn with the 
aid of a camera lucida. 
Fig. 1. Pinna of Peranema, showing open, simply forked venation. The veinlets terminate at 
points short of the margin, x 3. 
Fig. 2. Transverse section of stock, showing the dictyostelic arrangement of the meristeles ( st .), 
the leaf-trace bundles (//.), and the very numerous sclerotic patches {sp.). x 4* 
