42 CrCADEAN STEMS. 



specifically identical -with the Engiisli species, Otozamites oUums ; 

 the lower edge of the segments in the Gei-man type are more- 

 gradually curved upwards to the apex, as contrasted with the more 

 sudden bend near the tip of the English species; the difference, 

 however, is very slight, and whether identical or not the two forms- 

 belong to the same general type. Brawn Coll.'] 



V. 22. PI. I. Mgs. 3, 3». 



Two specimens, one the reverse of the other. The venation and 

 auriculate bases (Fig. 3») of the pinnse are vei-y clearly shown. 

 Bridgewater, Somerset. Purchased, 1881. 



39,059. PL I. Fig. 5. 



A good example illustrating the gradual tapering in breadth 

 towards the base of a frond ; probably not fully expanded. Some- 

 of the pinnse are clearly falcate, while others may be described as 

 straight. 



Langport, Somerset. Presented by Mr. E. W. Bagehot. 



V. 3362. Part of a frond 12cm. long; pinnae contiguous, 

 similar to those of 39,059 (Fig. 6). 



Lower Lias, Worcestershire. Brodie Coll.. 



V. 3456. Part of a leaf 4-2 cm. broad ; pinnse contiguous. 

 Lower Lias, Gloucestershire. Buclcman Coll. 



Other specimens : — 47,045 (very imperfect specimen, 36 cm. long,, 

 from Lyme), 52,668, 52,751. Purchased, 1866-74.. 



CYCADEAN STEMS. 

 The nomenclature and generic separation of fossil Cycadean 

 stems present considerable difficulties. In dealing with the 

 enormous number of trunks discovered in recent years in Jurassic 

 and Cretaceous rocks of the United States,^ Professor Lester Ward^ 

 has adopted the plan of using Buckland's generic name Cyoadeoidea 

 in a wide sense, including species possessing the characters of 

 Carruthers' genus Bentiettites. In the monograph on Italian Cycad 

 stems by Capellini & Solms-Laubach ' Cyoadeoidea is also cmploj-ed 



' Wardig.")), (00), (00'). 



2 Ward (94). 



' Capellini & Solms-Laubach (91). 



