THE CARBONIFEROUS ROCKS OF CANONBIE, DUMFRIESSHIRE, ETC. 789 



been figured and described as Calamites approximates to be referred ? Several of these 

 seem to be referable to Stur's Calamites Schiitzei, such as those figured in part by 

 Brongniart, by Artis, by Lindley and Hutton, and in part by Stur. 



The other forms with very short joints, such as those figured by Brongniart,* 

 GEiNiTZ,t Weiss, | Arber,§ and myself, || offer considerable difficulty in referring them to 

 any of the recognised species. Stur has proposed the name of Calamites Walden- 

 burgensis for these, but includes under this name some which appear to belong to 

 his Calamites Schiitzei.^ 



These short jointed Calamites possibly do not represent a true species, but may be 

 only a condition of growth of Calamites varians, Sternb.,** or of Calamites Schiitzei, 

 Stur. In fact, Calamites Schiitzei appears to be very closely related to Calamites 

 varians, Sternb., and may be only a form or variety of that species, and this view was 

 that which I previously held ; nor am I yet quite certain that this is not the correct 

 opinion, for in many cases it is difficult to determine whether some specimens should be 

 referred to Calamites Schiitzei or to Calamites varians, Sternb. Many of the specimens 

 I have previously recorded as Calamites varians would, according to the present view 

 of most botanists, be referred to Calamites Schiitzei, Stur. 



For the short jointed forms, to which I have already referred, until their true position 

 is determined, I would propose that Stur's Calamites Waldenburgensis be provisionally 

 employed for their reception. 



Locality D. 



Calamites (Calamitina) pauciramis, Weiss. 



(Plate IV. fig. 36 ; Plate V. fig. 44.) 



1881. Calamites (Calamitina) pauciramis, Weiss, Steinkohlen Calamarien, part ii. p. 93, pi. xi. fig. 1. 



This species is closely related to Calamites (Calamitina) discifer, Weiss,tt and may be 

 specifically identical, the chief difference being that C. discifer, Weiss, has three scars 

 on each branch-bearing node, whereas C. pauciramis, Weiss, has only two. The bark 

 of C. discifer is smooth, while that of C. pauciramis, Weiss, is said to be ribbed. 

 According to Weiss, the branch scars are borne on every third node. 



I have only seen two fragments of C. pauciramis, which are given on Plate IV. fig. 

 36 and Plate V. fig. 44, natural size. 



That shown on Plate IV. fig 36 is the more perfect, but is not sufficiently complete 

 to[show two branch-bearing nodes, only three internodes being seen, of which the lowest 

 node bears the branch scar. On this specimen the smooth bark is covered with short 



* Hist. d. ve'ge't.foss., pi. xxiv. figs. 2-5. t Vers. d. Steinkf. in Sachsen, pi. xii. fig. 3. 



I Steinkohl. Calamarien, part 2, pi. xxv. fig. 1. § Quart. Journ. Geol. Soc, vol. lix., pi. i. fig. 3. 



|| Trans. Roy. Soc. Edin.,vo\. xxxvii., pi. ii. figs. 5-6. Proc. Yorks. Geol. and Polytech. Soc, vol. xiv., pi. xxxv.fig. 2. 



II Stub, Calamarien d. Carbon-Flora d. Schatz. Schichten, p. 119. 

 ** Essai Jlore monde prim., vol. ii. p. 50, pi. xii. 



+t Weiss, Steinkohlen Calamarien, part ii. p. 91, pi. vii. fig. 3. 

 TRANS. ROY. SOC. EDIN., VOL. XL. PART IV. (NO. 31). 6 b 



