170 FLORA OF LOWER COAL MEASURES OF MISSOURI. 



the entire interval and character of the intervening nodes with leaf scars 

 being the same as on the front of the rock. 



The aspect of the fossils is much like that of the figures given by 

 Geinitz/ Schimper,^ and Lesquereux' as stems of Equisetites or Macrostachya 

 infundibuUforniis, though the leaf internodes are shorter and closer. All 

 the cicatrices in the verticils of large scars are of the same size. In the 

 nodal system the specimens are more comparable to the Calamites Goepperti 

 Ett.* (Calamitina Goepperti (Ett.) Weiss ^), while the relation to Galamitina 

 Solmsii of Weiss" {Macrostachya Solmsii (Weiss) Schimper^) is even more 

 striking. But the leaf scars in our specimens are not so nearly contiguous 

 as in C. Solmsii or the M. infundibulifonnis of various authors, being, in 

 part, disposed like those shown in some examples identified as C. varians, 

 or the Cyclocladia major figured by 0. Feistmantel.^ 



The carbonaceous covering is rather thick and finely striated longi- 

 tudinall}', though no distinct traces of ribs are present. Eight or nine very 

 short foliate nodes occur between two verticils of large scars. Distinct leaf 

 traces can be seen in portions of the specimens, where they are found to be 

 transversely oval, the longer diameter being about 1.5 mm., while the punc- 

 tate or slightly mamraillate centers are nearly 4 mm. apart. 



In all the verticils of large scars, three consecutive rows of which may 

 be seen on one specimen, the cicatrices are uniform in size, and it therefore 

 appears that either all the large scars for three consecutive rameal, or 

 strobilar, verticils are of tlie same kind, or that the rameal and cone scars, 

 if both present, are alike and of the same size. With respect to the dis- 

 tance between the leaves in the same verticil and the aspect of the large 

 scars, our example resembles the Calamites Germarianus Groepp. figured by 

 Stur." 



Cyclocladia Brittsii is distinguishable from other species by the very 

 broad and rather distant leaf scars and the short foliar internodes, 7 to 9 



' Verst. Steinkohlenform. Sachsen, 1855, p. 3, pi. x, fig. 5. 



- TraitiS pali5out. veg., vol. i, p. 333, pi. xxiii, figs. 13, 14. 



■' Coal Flora, i)l. iii, tig. 14. 



•' EttiDgshausen, Steinkohlenfl. v. Kadnitz, 1855, p. 27, pi. i, fig. 34. 



s Steinkohlen-Calamar., vol. i, 1876, p. 127. 



i^Op. cit., p.l29. 



'Zittel, Handbnch PaLvont., vol. ii, p. 172. 



* Verst. bohm. Ablag., vol. i, pi. ii. figs. 1, 2. 



"Calamarien tl. Carbon-Fl., p. L76, pi. xiv6, fig. 5. 



