or little-known Fossil Lycojiods. 361 



which became known to me while preparing the ' Catalogue 

 of the Palaeozoic Plants ' in that collection. All the specimens 

 represent a similar age of the plant, and perhaps are dif- 

 ferent pieces of one individual. 



The ribs measure across the dilated portions 22 millim. and 

 at the constrictions 19 millim. The leaf-scars are 16 millim. 

 broad and 12 millim. high, and 16 millim. apart. 



The whole surface of the bark is ornamented with a fine 

 granulation. On the central portion of the ribs it is more 

 strongly marked and the granulation slightly larger than on 

 the other portions of their surface ; but its presence is 

 distinctly seen over the whole area of the ribs. 



The two lunate vascular impressions are 3 millim. long, 

 and the central punctiform cicatricule is about 1 millim. in 

 diameter. The sinus on the upper margin of the leaf-scar, 

 though slight, is distinct. 



The ornamentation of the bark is of a somewhat similar 

 nature to that which occurs on Sigillaria duacensis, Bou- 

 lay*, but much finer. From this species it differs entirely in 

 the form of the leaf-scar and the position of the vascular cica- 

 tricules, which are central in S. duacensis, while those of 

 Sigillaria coriacea are placed above the centre. 



The specimens unfortunately do not bear any note of the 

 locality from which they were collected ; but from indirect 

 evidence there is every reason to believe that they came from 

 the Newcastle-on-Tyne Coal-field. 



The figure (PI. XL fig. 2) is taken from a plaster cast of 

 an impression of the plant in the British Museum. My 

 thanks are due to Dr. II. Woodward, F.R.S., for permission to 

 describe this species. 



Horizon. Coal-measures. 



Locality. (?) Newcastle-on-Tyne, Northumberland. 



3. Sigillaria Walchii, Sauveur. (PI. XL fig. 1.) 



Sigillaria Walchii, Sauveur, Veg6t. foss. d. terr. houil. de la Belgique, 

 pi. lvii. fig. 8 f ; Boulay, Terr, houil. du nord de France et ses veget. 

 loss. p. 48. 



Desertion. Ribs wide, smooth ; leaf-scars separated by 

 a short interval, subtriangular, as broad as high, the upper 

 angle obtusely rounded, the lateral angles placed below the 



* Boulay, ' Le ten-, houil. du nord de la France et ses vegetaux fossiles/ 

 p. 43, pi. ii. fig. 3. These de geologie presentee a la Faculte des Sciences 

 de Caen : Lille, 1876. 



t Acade'mie royale des sciences, des lettres et des beaux-arts de Bel- 

 gique, 1848. 



