13 



CALA MITES DUBIUS. 



DOUBTFUL C^LAMITE. 



Generic Character. 



Stem jointed, longitudinally striated ; impressions at the articulations usually 

 forming rings round the trunk. 



Specific Character. 



CALAMITES dubius. Stria narrow, with a fine obscure groove running 

 down their middle ; the fifth or sixth articulation surrounded by a double line of 

 impressions. 



Synonyms. 



This fossil plant does not seem to have been described or figured by any pre. 

 ceding writer. 



Description and Locality. 



Stem compressed, jointed, from two to three feet in length ; termination not 

 known. 



Joints striated with numerous slender striae, each having a fine but obscure 

 groove running along their centre : the two lower joints semicylindrieal and hollow, 

 as if they had partly surrounded a larger stem, as shewn in figure 1 . 



Articulations forming a rather irregular linear suture : the fifth or sixth has a 

 double line of large globular impressions, one line belonging to each of the connected 

 joints, and apparently left by a circle of some fleshy organs, which had once surrounded 

 the joints, and by their pressure left this indented frill, as in figure c 2. 



Found in the sandstone of Lea-brook quarry, near Wentworth, in Yorkshire. 



