DIOONITES. 47 



V. 2822. Here the pinnce are more oblique to the axis of the 

 frond, and the lower edges of the bases more decurrent, as in the 

 terminal fragment shown in PI. II. Fig. 3 (V. 2823). Eccles- 

 bourne. RufforA Coll. 



V. 2824. Similar terminal portion to preceding specimen. 

 Ecclesbourne. Rufford Coll. 



V. 2916. Two specimens. Rachis 16 cm. long, apparently 

 twisted, showing in the lower portion two alternate or sub- 

 opposite pinnae attached to its upper surface ; in the upper part 

 the segments are separated by 6 mm. of rachis, suggesting a view 

 of the under side of the frond. Pinnae slightly convex, presenting 

 the appearance of a broad midrib. Ecclesbourne. Rujford Coll. 



Dioonites Brongniarti (Mant.). 



1833. Cycadites Brongniarti, Mantell, Geol. S.E. England, p. 238. 



1841. Pterophyllum Brongniarti, Morris, Annals, p. 119. 



1842. Hisingera Mantellii, Miquel, Mon. Cycad. p. 62. 

 1844. Nilssonia Brongniarti, Goppert, Foss. Cycad. p. 57. 



1848. Cycadites Brongniarti, Bronn, Index pal. nomencl. p. 371. 



1849. Zamites Brongniarti, Brongniart, Tableau, p. 107. 



1850. Nilssonia Brongniarti, Unger, Gen. spec, plant, foss. p. 295. 



1851. Nilssonia Brongniarti, Bronn and Romer, Leth. geog. vol. ii. p. 61, 



pi. xxviii. fig. 14. 



1852. Nilssonia Brongniarti, Ettingshausen, Abh. k.-k. geol. Reicbs. vol. i. 



Abth. iii. No. 2, p. 23. 



1854. Pterophijllnm Brongniarti, Morris, Brit. foss. p. 19. 

 1856. Nilssonia Brongniarti, Bornemann, Organ. Rest. Lettenkohl. p. 59. 

 1871. Dioonites Brongniarti, Scbenk, Palseontographica, vol. xix. p. 236, 



pi. xxxii. fig. 2. 



1874. Dioonites Brongniarti, Schimper, Trait, pal. veg. vol. iii. p. 551. 



1875. Pterophyllum Brongniarti, Topley, "Weald, p. 409. 



1881. Dioonites Brongniarti, Renault, Cours. bot. foss. vol. i. p. 51, pi. iv. 



figs. 13 and 14. 

 1889. Dioonites Kotoei, Yokoyama, Journ. Coll. Sci. Japan, vol. iii. p. 44, 



pi. vii. fig. 1, and pi. xiv. fig. 14. 



