1 6 Seward, Jurassic Plufits in the Manchester Museiiui. 



This type-specimen was obtained b)- Williamson from 

 Haiburn Wyke, and presented with a drawing and brief 

 description to Lindley ; it is described by the former as 

 " no doubt produced by some one of the Cycadeoideous 

 stems of the Oolitic rocks." The rachis is 13 cm. in Iciif^th, 

 bearini^ irret^ularly disposed linear pinn;i,% about 7 mm. 

 broad, attached b\- a narrow base. The longest pinna 

 measures 7 cm. in length, and tapers gradually to an 

 acuminate ai)ex, but becomes suddenly narrow towards 

 the basal end ; a few of the pinn;e appear to be laterally 

 attached to the rachis, with a slightly decurrent lower 

 margin, but in one or two of the pinnae the attachment 

 appears to be rather on the upper face of the rachis. The 

 veins are numerous and parallel, as in the Cycadean 

 genus Zamites. The specimen is not sufficiently well 

 preserved to enable us to determine the exact manner of 

 attachment of the pinn;t, and it is very doubtful if all of 

 them are shown in their original position. It is probable 

 that the pinnae of this species were deciduous and 

 separated from the rachis by a definite separation surface, 

 and this circumstance adds to the danger of assuming 

 that the leaflets are all in their original positions. 



Zamites lanceolatuSy or, as it is more usually designated 

 by recent writers, Podoza7)iites lancco/atiis, is probably 

 the frond of a Cycadean [)lant, but it is by no means 

 impossible that it may be a twig of a Conifer similar to 

 Agathis australis Salisb. of New Zealand. 



Pagiophyllum Wi//ianisoni (Brou^n'mrt). 



Original specimens of pi. xciii., fig.s. i and 2. (Nos. 16 



and 48). 

 1828. Lycopodites Willianisonis, Brongniart, Prodrome, 

 p. 83. 



