330 



CALAMITES. 



[CH. 



stems with verticils of long and narrow leaves may be found 

 in Lindley and Button', and in the writings of many other 

 authors^ In the specimen shown in fig. 85 the leaves are 

 preserved apart from the stem, but from their close association 

 with a Calamite cast, and from the proofs afforded by other 

 specimens, it is quite certain they formed part of a whorl of 

 leaves attached to the node of a true Calamite, and a stem 



Fib. 85. Linear leaves of a_ Calamite (Calamitina). After Weiss, 

 slightly reduced. 



having that particular type known as Calamitina'^ (figs. 99, 100). 

 It is probable that in some Calamites, and especially in younger 

 shoots, the leaves had the form of narrow sheaths split up into 

 linear segments. This question has already been referred to in 

 dealing with certain Palaeozoic fossils referred to Equisetites*. 



A few years ago the late Thomas Hick^ of Manchester, 

 described the structure of some leaves which he believed to be 

 those of a Calamite. He found them attached to a slender 

 axis which possessed the characteristics of a young Calamite 

 branch. There can be little doubt that his specimens are true 

 Calamite leaves. The sketches of fig. 86 have been made from 

 the sections originally described by Hick. Fig. 86, 1 shows a 

 leaf in transverse section ; on the outside there is a well-defined 



^ Lindley and Hutton (31), Pis. cxiv., cxc. etc. Most of the speoimens 

 figured by these authors are in the Newcastle Natural History Museum. For 

 notes on the type-specimens of Lindley and Hutton, vide Howse (88) and 

 Kidston (90^). 



■" Weiss (88), Stur (87), etc. ^ Vide, p. 367. 



■• Ante, p. 260. ' Hick (95). 



