112 CONIOPTERIS. 



Other specimens: V. 3285 (cf. PI. XVI. Figs. 4 and 5), 

 V. 3293, V. 3305, V. 3673, 13,490, 39,268, 39;276, 40,469 (the 

 same form of frond as that from which Fig, 3, PI. XVII. is 

 drawn), 40,516, 48,733, 52,597. 



2. Coniopteris quinqueloba (Phillips). 



[Geol. Yorks., 3rd ed., p. 215, lign. 33, 1875.] 

 (PL XVI. Fig. 8; Text-figs. 14 and 15.) 



1875. Sphenopteris qiiinqtteloba, Phillips, Geol. Yorks. p. 215, lign. 33. 



S. arbuscula, var., ibid. p. 217. 



1877- Sphenopteris quinqueloba, Lebour, Illustrations Foss. Plants, pi. xxxviii. 

 1892. Sphenopteris quinqueloba, Fox-Strangways, Tab. Foss. p. 135. 



Frond tripinnate, of similar habit to that of the preceding 

 species, but the pinnules are of smaller size and characterized by 

 the narrow linear form of the ultimate segments. The sori and 

 sporangia appear to be of the Cyatheaceous type. 



Phillips gives the following definition of Sphenopteris quinqueloba : 



"Frond bipinnate; pinnae long, narrow, with a slightly flexuous 

 axis ; pinnules separate, petiolate, 5-lobed, changing to 3-lobed 

 towards the apex of the pinna." 



The specimens on which this diagnosis was founded were 

 obtained from Haiburn Wyke and Staintondale cliffs. Another 

 species, described by Phillips as Sphenopteris arbuscula, also agrees 

 closely with the specimens I have included under Coniopteris 

 quinqueloba. This species is described as a tripinnate frond, 

 with the pinnules "entirely pinnatifid, the lobes decomposed 

 into petiolate quinquepartite leaflets, set on a flexuous axis." 

 A smaller specimen is spoken of by Phillips as S. arbuscula, var. ; 

 this, I believe, is probably identical with S. quinqueloba : two 

 figures are given of this variety, one of which represents the 

 "extremity of a pinna with only the principal veins preserved," 

 exactly as in the accompanying enlarged drawing (Text-fig. 14) 

 of a specimen in the Manchester Museum. 



In all probability S. arbuscula, var., and S. quinqueloba are 

 specifically identical, while S. arbuscula may, perhaps, be referred 

 to S. Murray ana (cf. PI. XXI. Fig. 5). 



