36 CIENOPTEEIS. 



tend to greater uniformity in nomenclature if wc give precedence- 

 to this genus. The generic name Ctenopteris was first used by 

 Saporta, at the suggestion of Brongniart, for a Jurassic species, 

 Ctenopteris mjcadea; it is defined as follows: — " Frons pinnata 

 Tel bi-tripinnata, pinnae elongato-lineares pinnati-partitae basi 

 exappendiculatse, pinnulse basi tota adnatse decurrentes inter 

 se liberse versus apioem pinnarum plus minusve coufluentes, nervi 

 omues costa exorientes simplices furcatirjue divergentes, nervo- 

 medio nuUo, nervulis mediis dense quandoque fasciculatis ; fructi- 

 ficatio ignota." 



Ctenopteris cycadea (Brongn.)- 



[Hist. veg. foss. p. 387, pi. cxxix. figs. 2-3, 1828.] 



(PI. III. Figs. 1, Iff.) 



1828. Filiciieti cijeadea, Brongniart, Hist. Teg. foss. p. 387, pi. raxix.. 



figs. 2-3. 

 1832. Odontopteris eyeadea, Berger, Yerstein. Coburg Geg. p. 23, pi. iii. 



figs. 2-3. 

 1836. 0. Bergeri, Goppert, Syst. fil. foss. p. 219. 

 1869. Cycadopteris Bergeri, Schimper, Trait, pal. veg. vol. i. p. 487. 

 1873. Ctenopteris cycadea, Saporta, Pal. Fran^. vol. i. p. 355, pi. xl. 



figs. 2-5 ; pi. xli. figs. 1-2. 

 1880. C. cycadea, Nathorst, Ofvers. k. Vet. Akad. Forh. 1880, p. 45. 

 1884. Ftilozamites Bergeri, Kicliards, Synopsis Foss. Cycad. p. 2. 

 1887. Clenozamites cycadea, Schenk, Foss. Pflanz. Albourskette, p. 5,. 



pis. iii.-iv., vi.-ix. 

 1891. Ctenopteris cycadea, Saporta, Pal. Franc;, vol. iv. pi. Ixvi. 

 1893. Ftilozmnites Bergeri, Woodward, Lias, p. 378. 

 1900. Ctenopteris cycadea, Zeiller, Elements Paleobot. p. 101, fig. 75. 



Frond bipinnate ; pinnae attached to the broad rachis at an acute 

 angle, bearing broad, linear, entire pinnules; pinnules slightly 

 falcate, entire, attached to the axis of the pinna by the whole of 

 the base ; no midrib, the lamina of the ultimate segments traversed 

 by several slightly divergent and dichotomously branched veins. 



The Inferior Oolite species, previously described as Ftilozamites 

 {Ctenosamites) Zechnhi/i,^ heaxa a close resemblance to Ctenopteris 



Leckenby (64), pi. a. fig. 1. 



