526 DR. NEWELL ARBER AND MR. F. W. LAWFIELD ON THE 
Stur * had figured, in 1887, a more complete specimen from the Schatzlarer 
Schichten in Silesia. This specimen will be further discussed below. It 
confirms the provisional conclusion arrived at from the Kentish species, 
namely that the fossil represents the external surface of a Calamite. 
Dicryocatamires BURRI, Arber. (Plate 28. fig. 8; Plate 24. fig. 20.) 
1887. Cf. Calamites Schultzi, Stur, Abhandl. k-k. Geol, Reichs. Wien, vol. ii. part 2, 
p. 73, pl. 6. fig. 2. 
1912. Dictyocalamites Burri, Arber, Geol. Mag. dec. 5, vol. ix. p. 97, pl. 5. figs. 1, 9 & 5. 
Dracnosis.—Internodes somewhat variable in length, usually longer than 
broad. Surface smooth, with prominent, distant, reticulated grooved stris, 
forming an elongate network with acute angles, the nodes usually longer 
than the internodes, reticulations bearing no relation in position to the node, 
or origin of the roots. 
Root scars fairly large, irregularly oval on the nodes and internodes. 
Roots fairly stout, with fine and close transverse striations. 
DESCRIPTION OF SPECIMENS.—The type specimen figured on PI. 28. fig. 8, 
nearly twice enlarged, shows the reticulate ridges of an internode and also 
root sears. Another fragment of the type figured on PI. 24. fig. 20, like- 
wise nearly twice enlarged, shows a node and part of an internode, the latter 
having reticulate ridges and root scars. 
Remarks.—We are not convinced that the Kentish specimens, which are 
fragmentary examples obtained from the cores of a boring. are specifically 
identical with Stur’s plant. In the British examples the striations are 
somewhat closer and more prominent and grooved, the node is better defined, 
and the root scars are larger and more irregular. 
In any case Stur’s specific name can hardly stand, since under the name 
Calamites Schultzi he has also figured several pith casts, and there is no 
evidence that the particular specimen with which we are here concerned 
belonged to the same plant as the pith casts. 
Stur states that the anastomosing strize on his specimen are artificial and 
due to the fissuring of the coaly surface of the specimen. However this may 
be in the case of the Austrian example—and it appears to us to be very 
unlikely that Stur’s explanation is correct—it is certainly not the case in the 
British fossil. - 
From Stur's figure one would imagine that this fossil may be a rhizome 
and not an aerial stem. This again must remain doubtful until further 
specimens of this rare fossil are available. 
It may be also mentioned that according to Sterzel the sub-cortical surface 
of Calamites ohlsbachensis Sterzel T is reticulate. 
Distribution. 
Transition Coal Measures— Kent coalfields. 
* Stur (1887) p. 78, pl. 6. fig. 2, T Sterzel (1907) p. 437, pl. 67. fig. 15. 
