X] CALAMITINA. 369 



is in the Natural History Museum, Paris; it shows Astero- 

 phyllitean branches in organic connection with a Calamitean 

 stem, but it is not quite clear if the stem is a true Galamitina. 

 A large drawing of this interesting specimen is given by Stur^ 

 in his monograph on Galamites, also a smaller sketch by 

 Renault'^ in his Cours de botardque fossile. Similar branches 

 of the Asterophyllites type attached to an undoubted Cala- 

 mitina are figured also by Lindley and Hutton. There is, in 

 short, good evidence that stems of this sub-genus bore branches 

 with Asterophyllitean shoots. 



The wood of stems of the Galamitina group of Galamites, 

 in some instances at least, was of the Arthropitys type ; this 

 has been shown to be the case in some French specimens from 

 the Commentry coal-field'' and in others described by Stur*. 

 The pith- casts of Galamitina are characterised by comparatively 

 short internodes separated by deep nodal constrictions, as shown 

 in fig. 100. From Permian specimens from Neu Paka in 

 Bohemia, described by Stur^, we learn that there were the usual 

 Calami te diaphragms bridging across the wide pith-cavity at 

 each node. Such a cast as that shown in fig. 100 is often re- 

 ferred to as Galamites approximatus Brongn. ; the length of the 

 internodes and the periodic occurrence of branch-scars in the 

 form of circular or oval depressions along a nodal line enable us 

 to recognise the Galamitina casts. Weiss^ points out that in 

 pith- casts of this form the branch-scars occur on the nodal 

 constriction, and not immediately above the node as is the case 

 on the surface of a typical Galamitina. This distinction is 

 however of little or no value ; the point of attachment of a 

 branch may be above the nodal line, while on the pith-cast 

 of the same stem the point of origin of the vascular bundles 

 of the branch is on the nodal constriction I 



The specimen shown in fig. 100 illustrates the appearance of 

 a Galamitina cast. There is a verticil of branch-scars on the 



1 Stur (87), PI. XVII. - Renault (82), PI. xvii. fi^. 2. 



3 Renault and Zeiller (88), Pt. ii. p. 434, Pis. lii. and liii. 

 * Stur (87), p. 37, fig. 17. Vide also Grand'Eury (90), p. 208. 

 » Stur, loc. cit. " WeiBH (84), p. 61. 



7 Vide Grand'Eury (77), Pi. v. fig. o. 



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