I 



CARBONIFEROUS LTCOPODS AND SPHENOPHTLLS. 89 



cone of Bothrodendron is also apparently of the Lepidostrobus 

 type, and it is certainly very different in general appearance 

 from any known Sigillarian cone. I therefore prefer to assign to 

 Bothrodendron a position intermediate between Lepidodendron 

 and Sigillaria, with which two genera it seems to form a 

 connecting link, though it possesses distinctive characters by 

 which it can be separated at first sight from either. 



IX. Sigillaria, Brongniart, 1822. 

 1820. Lepidodendron, Sternberg (in part). Essai flore monde 



prim., I , fasc. 1, pp. 20 and 25. 

 1822. Sigillaria, Brongniart. Class, d. vdget. foss. (Mem. Mus. 



Hist. Nat., Vol. VIII., p. 9). 



1822. Clathraria, Brongniart. Class, d. ve'g^t. foss., p. 9. 



1823. Rhytidolepis, Sternberg Essai flore monde prim., I., fasc. 



2, p. 36; fasc. iv., p. xxiii. 

 1826. Favularia, Sternberg. Essai flore monde prim., I., fasc. 



iv., p. xiii. 

 1860. Asolanus, Wood. Proc. Acad. Nat. Sciences, PhiladeliMa, 



p. 237. 

 1877. Pseudosigillaria, Grand 'Eury. Flore carbon, du Depart. 



de la Loire et du centre de la France, p. 142. 

 1841. Calamosyrinx, Petzholdt. De Balano et Calamosyringe, 



p. 28 (Dresden and Leipzig). 



Decorticated Conditions. 

 1820. Syringodendron, Sternberg. Essai flore monde prim., I., 



fasc. 1, pp. 23 and 26; fasc. iv., p. xxiv. 

 1826. Catenaria, Sternberg. Essai flore monde p7-im., I., fasc. 



iv., p. XXV. 

 Arborescent Lycopods, with cactus-like or columnar trunks, 

 or very sparingly dichotomously-branched stems. Outer surface 

 longitudinally ribbed or smooth. Leaf-scars contiguous or 

 distant, hexagonal, with more or less rounded angles, the two 

 lateral angles being most prominently developed; cicatricules 

 three, small, the central punctiform, elongate, or sub-triangular, 

 the two lateral, lunate or straight, larger than the central 

 vascular bundle-scar. Leaf -scar frequently placed on a more or 

 less prominent elevation, in which case it holds a backward 



