FE03I THE IITJTTON COLLECTION. 127 



ferred to, with which there can be no doubt it is correctly 

 identified. But it is not a Calamite. 

 Loo.— Low Moor, Yorkshire. (H.C. 568). 



244. Fragment of stem, nine inches long by five broad, orna- 

 mented like No. 245, of which it is probably a portion. They 

 are undoubtedly the same as Sternberg's Calamites regularis. 

 Loc. — Shale above the Bensham Seam, Jarrow. {H. C. 567). 



245. — Calamites regularis, Sternberg sp. 



Fragment of a large, broad stem, the full width not ascer- 

 tained, eight inches by six. The whole surface finely striated 

 longitudinally, with very large somewhat elliptical apertures 

 and large leaf-scars arranged obliquely across the stem. 

 Loc. — Shale above the Bensham Seam, Jarrow. (H. C. 566). 



Remarks. — Some authors still retain Sternberg's plant Cala- 

 mites regularis in that genus, but the shape of the leaf-apertures 

 or scars, and the manner in which the stem is covered ■with 

 longitudinal strise or grooves, the impressions of foliar-vessels, 

 and the absence of joints, exclude it, at once, from that genus. 

 The similarity of the scars, and their oblique arrangement across 

 the stem, point to its affinity to those stems which are assigned 

 by Grand 'Eury and others to Corclaites. 



Cordaites ? 



24:6.— Corclaites 



Counterpart of the next specimen No. (247), with three ob- 

 lique lozenge-shaped scars up the centre, and others indicated 

 on the sides. The surface has a finely granulated or shagreen 

 appearance. 

 Loc. — Shale above the Bensham Seam, Jarrow. (H. C. 41n). 



247. Impression with several scars. The surface finely 



shagreened or striated all over, except the leaf -scars, which 

 are large lozenge-shaped openings somewhat spirally arranged 

 on the stem. 

 Loc— Shale above the Bensham Seam, Jarrow. {H. C. 414). 



Remarks. — At first sight these two specimens might be sup- 

 posed to be an inner layer of the cortex of Halonia regularis from 

 the arrangement of the scars, and it is by no means certain that 

 they are not. The strongly shagreened surface and the shape 



