22 Sew AKD, J/n nssi'c Platits in tJic Manchester Mnscuvi. 



specimen mentioned b\' the Swedish palaeobotanist is no 

 doubt that shown in fig. 4, which was found at Claugliton 

 \V}'ke ; it represents an imperfect leaflet or pinna, 9 cm. 

 long and 2'6 cm. wide, with prominent irregularly parallel 

 and anastomosing veins. The substance of the leaflet 

 must have been fairly stout ; it is represented in the fossil 

 by a brittle brown lamina which readily separates from 

 the shale, and under a low magnifying power presents a 

 finely punctate appearance. On the back of the specimen 

 Prof Williamson has written, "Probably an AntJiropJiyopsis 

 of Nathorst." In a later memoir on the Flora of Rjuf, 

 Nathorst^ refers the plants previously included by him in 

 the genus AnthropJiyopsis to the older genus Ctenis of 

 Lindley and Hutton, and there is little doubt that 

 this designation is more correct. In a recent paper 

 on fossil Ctenis species, Staub" adopts the generic term 

 Ctenis for Nathorst's Scanian specimens, originally placed 

 under AntJi ropliy apsis. 



In fig. 3 a portion of the epidermis (lower?) of the 

 pinna is represented to show the form of the epidermal 

 cells ; the straight or slightly curved walls agree with those 

 of the epidermal .cells of most recent cycads, and differ 

 from the undulating walls which are usualh' met with in 

 the leaves of ferns. Each epidermal cell in the fossil 

 pinna is characterised by the [)resence c)f a central papilla 

 in the outer wall, which in surface-view presents the 

 appearance of a spherical nucleus. A few of these papillae 

 are shown in surface view in fig. 3A, p. A side-view of 

 the cells at once reveals the true nature of these nucleus- 

 like bodies, and shows that each cell possesses a fairly 

 prominent central papilla (fig. 313). It is these papilla; 

 which give to the specimen its finely punctate form, as 

 seen under a low magnif\'ing power. A surface view of 



1 Nathorst (7S-86). "- Slaub. (96). 



