Page:Quarterly Journal of the Geological Society of London, vol. 28.djvu/204

 Sigillaria dichotoma, Haught. ibid. p. 234 (but not p. 235, which certainly belongs to Lepidodendron).

Filicites dichotoma, Haught. ibid.

This is distinguished from C. kiltorkense, 1st, by the smaller and more approximated leaf-scars (warts); 2ndly, by the absence of the fine, close, longitudinal striae ; 3rdly, by the strongly prominent transverse striae ; 4thly, by the distinct central scar of the warts. These differences are not to be seen only in the specimens from Kiltorkan, but also in those from Bear Island (see my 'Fossil Flora of Bear Island,' pls. xi. & xii. figs. 11 & 12, enlarged 11 b & 12 b).

The Stem (fig. 3). — This specimen has a breadth of 33 millims. The leaf-scars, 1 millim. broad, stand close together ; for they are only from 1 to 1-1/2 millim. apart. It has very distinct transverse striae, which in part run over the whole width of the stem ; with these there are also longitudinal striae, which, however, stand further apart and are more irregular and deeper than in the former species. The scars are partly circular, partly oval ; they are sharply defined, with a projecting rim and a central wart. The transverse rows (as represented in the bough figured by Lyell) are almost horizontal, tolerably widely separated from each other, in consequence of the pressure undergone by the stem, while the scars have drawn near to each other, by which means they apparently receive an almost whorled position, which in fact Haughton has ascribed to the Cyclostigmata.

Branch. — The branch shown in fig, 2 is 11 millims. in breadth, and is divided in the upper part into two branches of almost equal thickness. The scars have a breadth of 1 millim., and, as on the stem, are about 1 to 1-1/2 millim. apart. They are circular, very sharply defined, with a distinct projecting rim and central wart. Here also we have irregular transverse striae and also the shallow longitudinal striae. Between these the bark is quite flat, and the finer striae of the former species are wanting. That this cannot be a branch of Cyclostigma kiltorkense may be seen by a comparison with fig. 4 and fig. 5 c. These last are branches of C. kiltorkense, which are distinguished from those of C. minutum by the characteristics given above. We have therefore branches and stems of Cyclostigma minutum (fig. 3) and branches and stems of C. kiltorkense; of these last I have figured one in fig. 5 a. There are, however, some twice as thick.

3. Knorria acicularis, Gopp., var. Bailyana.

Knorria Bailyana, Schimper, Paleont. Veget. ii. p. 48.

The specimen figured (fig. 6) agrees so well with Knorria acicularis, Goppert, in the slender linear pointed warts (see Gopp. Nova Act. Acad. Loop. Carol. 1852, p. 200, pl. xxx. fig. 3, and Heer, 'Fossil Flora of Bear Island,' pl. x. figs. 6, 7) that I thought myself justified in referring it to that species. It differs from the specimens from Bear Island and Silesia only in the more closely ap-