304 FOSSIL FLORA OP THE 



combines an extraordinary assemblage of structural peculiarities, 

 and forms a link connecting three of the great divisions of the 

 vegetable kingdom. Being, however, principally composed of cellular 

 tissue, like most of the other plants of the era, it was succulent and 

 fitted to flourish in damp and swampy grounds. 



Calamites Suckowii (Brong.). Ref. Brong. Hist. t. 15. f. 5. 



Locality. Alnwick Moor, in sandstone. 

 Calamites canNjEformis (Schloth.). Ref. Brong. Hist. t. 21. 



Localities. Alnwick Moor and Dunse, iu sandstone. 

 Calamites distans? (Sternb.). 



Specimens occur in the sandstone at Alnwick Moor which probably 

 belong to this species ; though with a diameter of only 6 lines and a 

 length of 3^ inches, there is no appearance of articulation. 



Calamites tricarinattjs (Tate). 



Articulations distant from 3^ to A\ inches apart ; in the lower 

 part of the stem the ribs are irregular, prominent and flexuous, and 

 the sulcations broad, irregular and rugose ; in the upper part the ribs 

 are parallel, 1^ line broad, and each rib is tricarinated, one carina 

 being central and the other two lateral. 



This species has no near resemblance to any other. The cha- 

 racters we have taken from two specimens obtained from the same 

 locality. 



Locality. Shilbottle, in sandstone. 



Mndogenous Plants. 



Genus Poacites (Brong.). 



This genus includes Endogenous leaves, the veins of which are 

 parallel, simple, of equal thickness, and not connected by transverse 

 bars. 



Poacites nervosa (Tate). Plate XIII. fig. 5. 



A leaf linear, acuminate, veins numerous and very fine ; length of 

 the specimen 41 inches, and greatest breadth 1^ line. 



This leaf does not differ greatly from that of an ordinary grass, 

 such as Alopecurus or Anthoxanthum, the foxtail and vernal grasses. 



Locality. Budle, in shale. 



Genus Crinites (Tate). 



This genus is proposed for those leaves which have a midrib and 

 parallel veins, unconnected by transverse bars. 



Crinites lanceolata (Tate). Plate XIII. fig. 6. 



A fragment of a leaf which had been several inches long ; it is 

 lanceolate with a thick prominent midrib and numerous veins. 



