CARBONIFEROUS LYCOPODS AND SPHENOPHYLLS. 



85 



lateral angles more or less prominent, containing three puncti- 

 form cicatrices. Resting on or a short distance above the leaf- 

 scar is a small circular cicatricule. Leaves small, lanceolate, 

 single-nerved. Fructification m the form of cones, terminating 

 delicate branches (Both, minuti folium, Boulay). or sessile and 

 placed in two opposite vertical rows 

 {Both, punctatum, L. & H.), which 

 form cup-like depressions on the older 

 stems, and whose umbilicus is below 

 the centre and near the lower margin. 



Subepidermal leaf-scar double {Both. 

 minutifolmm),\n other species single (1) 

 The internal structure of the stem is 

 unknown. 



Remarks. — Bothrodendron Qora^v'i^ea 

 a small but most interesting class of 

 Lycopods, about which, however, there 

 is still much to learn. From the some- 

 what imperfect description of the genus 



by Lindley and Hutton, and the absence -r,- ■,. d .1 7 7 

 -' -^ ' Fig. 14. — Bothroaendron mm- 



of enlarged drawings of the leaf-scars, utifoHum, Boulay sp. a, 

 it was presumed by several writers 

 that the genus Bothrodendron had 

 been founded on a decorticated speci- 

 men of Siijillaria discophora, Konig 

 sp. (= Ulodendron minus, L. & H.), and this erroneous view I 

 also originally held. 



M. Zeiller has, however, shown most conclusively that 

 Bothrodendron forms a most distinct and clearty-defined genus 

 and at my request most kindly figured and described a specimen 

 of Bothrodendron punctatum, L.&H., from Newcastle, presented 

 by Hutton in 1836 to the Museum of Natural History, Paris, on 

 \vhich the leaf-scars are very well preserved.' 



The leaf-scars are very minute, and the leaves, which are 

 broadly lanceolate, resemble very much those of some 

 Lycopodium. 



Portion of stem, natural 

 size ; b, leaf -scar and orna- 

 mentation of bark, en- 

 larged. 



^ Bull. Giol. Soc. de France, 3rd Ser., Vol. XIV., p. 168, PI. VIII. 

 figs. 1 and la. 1885. 



