THE JURASSIC FLORA OF SUTHERLAND. 667 



specimens with confidence, but the resemblance to the sterile fronds of Coniopteris 

 arguta from the Yorkshire beds is, I think, sufficiently close to justify the adoption of 

 that specific name. It is difficult in the case of fragmentary examples to distinguish 

 between the pinnae of 0. arguta and Kluhia exilis (Phill.). An Indian species, 

 Pecopteris? lobata Okl. and Morr., # may be identical with this type. 



Coniopteris quinqueloba (Phillips). (PI. VIII. fig. 28.) 

 1875. Sphenopteris quinqueloba, Phillips, Geol. Yorks., p. 215, fig. 33. 



The small pinnules of the piece of frond represented in photo. 28 indicate a more 

 delicate type than Coniopteris hymenophylloides ; they agree in their oblong deltoid 

 shape and lobed, basally constricted, lamina with the segments of the species which 

 Phillips described from the Yorkshire coast as Sphenopteris quinqueloba, a fern 

 subsequently referred to Coniopteris on the discovery of fertile segments by NATHORST.t 

 A specimen of Phillips' species in the Bean collection in the British Museum (39,263) 

 agrees precisely with the Culgower fragment in the nature of the pinnae and pinnules. 

 This fern may be compared with Hymenophyllites delica.tulus Sap. | from the French 

 Corallian, and with Salfeld's figure of Stachypteris lithophylla § from the Corallian of 

 Germany. 



5. Osmundacese. 



TODITES. 



Todites Williamsoni (Brongn.). (PI. II. figs. 27, 27A ; PL IV. fig. 57 ; 



PI. VII. fig. 15.) 



1828. Pecopteris Williamsonis, Brongniart, Prodrome, p. 57. 



1900. Todites Williamsoni, Seward, Jurassic Flora, vol. i. p. 87, pi. xiv. figs. 2, 5, 7 ; pis. xv., xxi. 



The specimen represented in fig. 27, PI. II., 7 cm. in length, has an almost uniform 

 breadth, 5-8 mm., and gives the impression of having formed part of a long and very 

 gradually tapered pinna. The pinnules are falcate and acutely pointed, the upper margin 

 is slightly lobed at the base and the lower edge strongly curved ; the venation is 

 obscure, but is seen in the enlarged drawing (fig. 27A) to consist of a midrib with 

 secondary forked veins arising at an acute angle. An almost complete distal end of 

 a linear pinna is shown in fig. 57, PL IV. A larger though more imperfectly preserved 

 specimen reproduced in photo. 15, PL VII., affords evidence as to the nature of the 

 plant. Portions of four linear pinnae are attached at an acute angle to a broad rachis, 

 the longest pinna being indistinguishable from the pieces shown in figs. 27, 57 ; it 

 reaches a length of 1 2 cm. The axis of each pinna is fairly broad. This larger example 

 exhibits the features characteristic of Todites Williamsoni, which are well illustrated 

 in the numerous specimens described from the Inferior Oolite of Yorkshire, || namely 



* Oldham and Morris (63), p. 52. t Seward (00), p. 114, fig. 15. 



\ Saporta (91), p. 389. § Salfeld (09), pi. iii. fig. 4. || Seward (00). 



TRANS. ROY. SOC. EDIN., VOL. XLVII. PART IV. (NO. 23.) 99 



