THE JURASSIC FLORA OF SUTHERLAND. 699 



Oycadean pinnse, cf. Dioonites Dunkerianus (Goepp.). (PL V. fig. 100.) 

 The pieces of two linear segments represented in fig. 100 are characterised by the 

 presence of a shallow median groove, but show no signs of undoubted veins. As I have 

 elsewhere shown, * it is very difficult to distinguish imperfectly preserved segments of 

 Cycadites from the narrow linear pinnse of such fronds as those of the Wealden species 

 Dioonites Dunkerianus (Goepp.). The fronds of the recent Cycad Encephalartos 

 Ghellinckii afford an example of the close agreement between narrow segments with a 

 revolute margin, in which the median groove formed by the recurved edge simulates a 

 midrib, and the segments of Cycadites. A specimen similar to that seen in fig. 100 is 

 figured by Heer from the Cretaceous of Greenland as Cycadites Dicksoni ; + the pinnse 

 of Cycadites Saport8e\ and other species may also be compared with the Culgower 

 fragment. There is no evidence, however, which would justify the use of the generic 

 name Cycadites in the present case. 



Cycadospadix, Zigno. 



Cycadospadix Pasinianus Zigno. (PI. VII. fig. 18.) 

 1885. Zigno, Flor. Foss. Oolit., p. 156, pi. xlii. figs. 2, 3. 

 The specimen reproduced in photo. 18, PI. VII. , consists of a leaf-like organ of 

 fibrous structure in which there is no distinct indication of veins, characterised by a 

 fimbriate margin identical with that on some examples figured by Zigno from Italian 

 Jurassic beds. Carpellary leaves of Cycas revoluia and some other recent species 

 usually consist of a long stalk terminating in a triangular expansion like that shown 

 in photo. 18. The absence of a stalk or of any indication of a scar in the fossil made 

 me hesitate to adopt the generic name Cycadospadix, but the discovery of specimens 

 of Cycas pectinata in the Herbaria of Kew and the British Museum in which carpels 

 of the normal type are associated with others consisting only of the triangular terminal 

 portion identical in form with the impression from Culgower, adds weight to the 

 suggested Cycadean relationship. The fossil may be compared with a fimbriate stipule 

 such as is borne on the fronds of some recent Marattias. Similar specimens of 

 Cycadospadix have also been described by Saporta.§ 



Plants incert^e sedis. 



A. Photo. 1, PI. VI. 



The specimen represented slightly less than natural size in photo. 1 consists of 



numerous torn carbonaceous films in which no veins can be recognised ; many of the 



ragged segments lie in different planes, as seen at a, separated from one another by 



narrow strips of matrix. There is a slight resemblance as regards the overlapping of 



* Seward (95), p. 44. t Heer (82), pi. xiv. \ Seward (95), p. 29, pis. iii., vi., viii. 



§ Saporta (75), pi. cxvi. 

 TRANS. ROY. SOC. EDIN., VOL. XLVH. PART IV. (NO. 23). 103 



