236 . CTENIS. 



Natural History Museum, Paris, bears Brongniart's name Zamia 

 longifolia, and demonstrates that this designation was applied to 

 the pinnate frond now known as Ctenis falcata. 



33,763. PI. VIII. Pig. 2. 



A good specimen, showing very clearly the manner of attachment 

 and venation of the pinnae. The longest pinna is rather more 

 than 12 cm. long, without the apex, and 1*2 cm. wide. Each 

 pinna is broadest at the base, and the lower margin is decurrent 

 on the rachis, being overlapped by the upper edge of the pinna 

 next below. 



Gristhorpe Bay. Mantell Coll. 



V. 3559. Similar to the specimen shown in pi. ciii. of Lindley 

 and Hutton. Fragments of apical portions of fronds; the pinnae 

 are more oblique to the rachis than in 38,763, and their lower 

 margins strongly decurrent. The veins are clearly shown. 



Bowerhank Coll. 



V. 3560. Parts of fronds with long and gradually tapering 

 pinnae ; the longest pinna is about 13 cm. long, and near the apex 

 only 4 mm. in breadth. This example affords an indication of 

 the long and tapered pinnae which characterized the species ; in 

 most specimens the distal part of the pinnae is not shown. 



39,206. Similar to 38,763 (PL VIII. Pig. 2), but with rather 

 narrower pinnae. The irregularly striated surface of the rachis is 

 distinctly shown, with the pinnae attached to the margin. 



Upper Shale, Scarborough. 



Other specimens .-8089, 13,514, 38,762, 39,205. 



2. Ctenis, sp. 



(Text -figs. 42 and 43.) 



1880. Anthrophyopsis, nov. sp., Nathorst, Reseberatt. p. 83. 

 1892. Anthrophyopsis, nov. sp., Fox-Strangways, Tab. Foss. p. 129. 

 1900. Ctenis, sp., Seward, Manchester Lit. & Phil. Soc. vol. xliv. p. 21, 

 pi. ii. fig. 4. 



The specimen in the Manchester Collection referred to as 

 Ctenis, sp., is too small to enable one to give a diagnosis of the 



