392 MR ROBERT KIDSTON ON THE FOSSIL FLORA OF THE 



Those fern stems, therefore, of the type of Caulopteris macrodiscus lose all 

 true specific value, but as at present it is usually impossible to refer them to 

 their parent species, I have mentioned them under C macrodiscus, merely with 

 the object of noting the occurrence of such fossils. 



On Plate XXVI. fig. 2, is shown a specimen, natural size, which exhibits 

 the formation of a Caulopteris macrodiscus fern stem from one of C. peltigera 

 type. There is shown here part of the outer envelope still adhering to the stem, 

 which when removed, exhibits beneath it the striated surface of macrodiscus. 



Caulopteris primseva, Lindley & Hutton. 



Caulopteris primceva, L. & H., Foss. Flora, vol. i. pi. xlii. 

 Caulopteris primceva, Schiniper, Traite d. paleont. veget., vol. i. p. 707. 

 Sigillaria Lindleyi, Brongt., Hist. d. veget. foss., p. 419, pi. cxl. fig. 1. 



Remarks. — This species is very rare. As far as I am aware, only two speci- 

 mens of it have been discovered. One of these is that figured by Lindley and 

 Hutton, from Radstock, and the other is from Camerton in the collection of 

 the Bristol Museum. 



Localities : — Radstock ; Camerton. 



Caulopteris anglica, Kidston, n. sp. 

 Plate XXVI. fig. 3. 



(1) Caidopteris peltigera, Geinitz, Vers. d. Steinhf. in Sachsen, pi. xxxiv. fig. 3. 



Description. — Frond cicatrices almost contiguous, oval, slightly narrowed 

 above. Vascular cicatrices nearly equally distant from all parts of the circum- 

 ference ; double, outer closed, inner " horse-shoe " shaped. 



Remarks. — All the specimens of Caulopteris (with the exception of C. 

 primwca and C. macrodiscus) from the Radstock area, which were in a 

 sufficiently good state of preservation for specific determination appear to 

 belong to this species. 



On PI. XXVI. fig. 3, is given, half natural size, an example from Radstock in 

 the collection of the Bath Museum. The scars are oval, and slightly narrowed 

 at the upper extremity. Some of them show a second inner circle, outside of 

 and surrounding the " horse-shoe " scar. This is well seen in the middle scar 

 in the left-hand row. The same character I have observed in other specimens. 

 It is quite probable, then, that the outermost of the two inner circles corre- 

 spond to the closed circle of Zeiller, and the " horse-shoe " scar to the inner 

 curved transverse scar, only much more developed. 



On Plate XXVI. fig. 5, is shown an isolated scar with a very distinct " horse- 

 shoe," but with no trace of the surrounding closed circle. The scar is quite 

 smooth, but the absence of the surrounding closed circle makes it improbable 

 that this small specimen belongs to Caidopteris anglica. 



