64 



EQUISETITES. 



1880. Schizoneura cf. S. hoerensis, Nathorst, Berattelse, p. 54. 



1883. Calamites Beanii, "Williamson, B. Instit. p. 4. 



1886. Calamites Beanii, Gardner, Geol. Mag. vol. iii. [3], p. 201, pi. ix. fig. 3. 



1898. Equisetites Beam, Seward, Foss. Plants, vol. i. p. 270, figs. 60-62. 



Type-specimen. Manchester Museum (No. 88). Stems reaching 

 a circumference of 30 and 40 mm., bearing at the well-defined nodes 

 leaf -sheaths consisting of numerous long and narrow segments. 



The scanty material of this species is insufficient to enable us 

 to give a satisfactory diagnosis. Equisetites Beani is retained 



F IG . 5. Equisetites Beani (Bunb.). f nat. size. [From a specimen in the 

 Manchester Museum ; after Starkie Gardner (86), pi. ix. fig. 2.] 



as a distinct species chiefly on the ground of the greater diameter 

 of the stem than in E. columnaris; in other respects the two 

 species appear to be very similar, and it is not improbable that the 

 stout casts included under the present species may be unusually 

 large examples of the preceding type. 



In 1851 Bunbury proposed the name Calamites Beani for some 

 sandstone casts of stems from the Inferior Oolite of Yorkshire, 



