FROM THE HUTTON COLLECTION. 117 



224. — Sigillaria reniformis, L. et H. Type specimen, F. F., pi. 57. 

 There are two labels by Hutton on this slab. The original 

 one " Sigillaria reniformis. P. 57." I think this specimen 

 has been obtained from the Cramliugton district. It is a 

 compressed impression of four broad ribs on both sides of the 

 slab of shale. The ribs are an inch and a half broad, with 

 six scars. The scars are double, and are evidently the very 

 enlarged slits seen on the leaf-scars of younger and better 

 preserved specimens. The surface of the shale is finely striated 

 longitudinally, and on the side figured bears traces of some 

 insect burrows in the inner surface of the original bark, as 

 seen on the figure, pi. 57. 

 Loc. — Coal-measures, Newcastle. {H. C. 484). 



225.— Sigillaria alternans, L. et H. Type specimen, F. F., pi. 56. 

 The original label on this specimen is "Sigillaria alternans, 

 Cramlington. P. 56." In a carbonaceous matrix. A row of 

 five double scars or oval apertures, through which the foliar 

 vessels passed to the leaves. These apertures are very oval 

 and apart, which partly arises from long maceration and partly 

 from the circumstance that these fissures on the stems of old 

 Sigillaria? are larger and much wider apart than they are on 

 younger stems. 

 Loc— Cramlington. (H. C. 487). 



226. This is only a part probably of the Type-specimen, 



which, being in coal, had been broken into several pieces, 

 which could not be fitted together or repaired. The impression 

 consists as in the last of rows of double scars or oval fissures, 

 very large and separate from each other. The division be- 

 tween the ribs slickened and nearly obliterated. This appear- 

 ance is due to the decomposed state of the plant previously to 

 being fossilized. 

 Loc— Cramlington. (H. C. 487). 



227.— Sigillaria c.atenulata, L. et H. TYTE SPECIMEN, F. F., pi. 58. 

 It is labelled by Hutton '' Sigillaria catenulata, Jarrow, B. 

 P. 58 ;" but it is a very doubtful Jarrow specimen, and the 

 matrix is more like the Killing-worth and Cramlington speci- 

 mens. It is in a carbonaceous matrix. Two rows of twelve 

 ovate apertures on two very broad ribs. The two large, 

 vascular fissures formed into one on this specimen from 

 maceration and subsequent compression during mineraliza- 

 tion. This is only one of the many appearances of the bark 

 of S. reniformis. 

 Loc — In Coal, Jarrow Colliery. (H.C. 491). 



