4 



CALAMITES APPROXIMATES. 

 SHORT-JOINTED CALAM1TE. 



Generic Character. 

 Stem jointed, longitudinally striated; impressions at the articulations usually 

 forming rings round the trunk. 



Specific Character. 

 CALAMITES approximates. Stem arborescent, jointed ; joints very short, in- 

 tercepted by distinct articulations, with small compressed tubercles, forming a studded 

 ring round the trunk. 



Synonyms. 

 Calamites approximates. Sclilotheim, Petrefactenkunde, p. 399. 

 Calamites interruptus. Schlotheim, Petrefactenkunde, p. 400. tab. 20, f. 2. 

 Calamites approximates, caudice arboreo, suturis etiam in maximis exemplaribus 

 valde approximatis. Count Sternberg, Essai, part 2, p. 36. 



Description and Locality. 



Stem simple, straight, sometimes attaining five feet in length, jointed, striated. 



Articulations very distinct, close (being generally about one-fifth of the diameter 

 apart), tuberculated. 



Tubercles of the articulations numerous, small, circular, flattish at top. 



Found imbedded horizontally in the soft sandstone at the bottom of the rock 

 in Hober Quarry near Wentworth. It has also been found in other parts of York- 

 shire, as also in the bishoprick of Durham, the county of Northumberland near New- 

 castle, and as it appears from the works of the authors which have been cited, in 

 various parts of the continent. 



Observations. 



The first figure represents a portion of the upper part of the trunk of the natural 

 size, and terminating at top in a sharp compressed point. 



The second figure, in outline only, exhibits, on a reduced scale, the propor- 

 tionate sizes of the upper and lower extremity of the trunk. 



The tubercular studs or warts, which are probably the cicatrices of fallen leaves, 

 rise directly from the articulation itself, and not from the lower termination of the 

 striae, as they do in the species named Calamites decoratus, a figure of which is given 

 in the 24th plate. 



This species, like most of those placed in this genus by various authors, is refer- 

 able to the proposed genus bambusites of Dr. Martius. 



