119 



CYCADEAE. (Cycadeacites Prcsl). 



I. CYCADITES Brong. 



Trunci arborei, structuram externam et internam Cycadeacearum exhibentes. 

 Frondes pinnatae seu potius pinnatisectae, pinnis angustis integerrimis praeter ner- 

 vum medium crassiusculum enerviis saepe juxta illum longitudinaltier plicatis. 



Sie gönn ber SBebel unb ber üftert>ent>ertauf ber fyierfyer gerechneten tfrten entfprer 

 d)en ber je£tn?eltltd)en ©attung Cycas. 



A. Trunci. 



1. Cycadites columnarts Pres!. 



C. trunco tereti recto, decorticato longitudinaliter inaequaliter obtuseque multi- 

 sulcato, cortice crasso, cicatricibus foliorum irregulariter rhomboideis convexis con- 

 tiguis spiraliter truncum ambientibus numerosis in ordine spirali quaternario (V) 

 dispositis. 



Presl in Sternb. Vers. Fl. d. Vorw. VII. und Vin. Heft, p. 194. Tab. XL VII. Fig. 1 — ö. 



Steinfofylenformation 51t 9tabni| in Sofymen» 



"2. Cycadiies i'jirohdus Presl. 



C. trunco decorticato tereti laevi, corpore ligneo structuram Cycadeacearum 

 demonstrante. 



Presl in Sternb. Vers. Fl. d. Vorw. 1. c. p. 194. 



Wut ber vorigen litt in ber ©teinfotytenformation. 



3. Cycadites Bucklandi Presl. 



C. trunco cylindrico rotundato - obtuso, rudimentis petiolorum squamaeformibus 

 creberrimis imbricatis adpressis spiraliter dispositis magnis crassis ovatis obtusis ex- 

 tus convexis intus concavis, axi tereti figuris longitudinaliter ellipticis spiraliter dispo- 

 sitis instructa. * 



Presl in Sternb. 1. c. p. 194. 



Conites Bucklandü Sternb. 1. e. III. Heft, p. 36 et 39, tab. 30, und IV. Heft, p. XXXIX } Buck- 

 landia squamosa, Brong. Prod. p. 125, 200 $ Bronn's Lethaea geogn. T. XV, p. 224 5 Amen- 

 tum Cycadeoideae Buckl. in Geol. Transact. N. S. 11, 400; Encephalartos Bucklandi Miquel 

 monogr. Cycad. p. 6S. 



£)olitf)formation ju ©toneSftelb in ßnglanb. 



