208 I'TEKOPHYLLVM. 



5. Cardiocarpus, sp. (from South Africa). 



V. 3614. Figured by Seward (97'), p. 332, text-fig. Id on 

 p. 324. A small seed, 9 mm. long and 65 mm. in breadth. 

 Mr. Seward has pointed out that the broad margin surrounding 

 the oval central region is interrupted at the base by what appears 

 to be a canal leading to the base of the seed. This seed occurs 

 with another specimen, described by Mr. Seward as a leaf of 

 doubtful affiuity. 



Casey's Township, Transvaal. Pres. by B. Draper, Esq., 1897. 



Class CYCADOPHYTA. 



The term Cycadophyta has been recently proposed by Nathorst 

 to include fossil fronds similar in habit to those of the recent 

 Cycads, whose affinities, whether to that family or to other extinct 

 races of the same stock, are at present unknown. Such fossils 

 appear first in the Permo-Carboniferous rocks, and are especially 

 characteristic of the Mesozoic period. A few Cycads, remnants of 

 what was once a great and complex group, still survive at the 

 present day. 



Genus PTEROPHYLLUM, Brongniart, 1825. 



[Ann. Sci. Xat., ser. i, vol. iv, p. 211.] 



Fronds simply pinnate, pinna? attached to the rachis by their 

 whole base, usually linear, with parallel sides, generally con- 

 siderably longer than broad, truncated, rounded, or, more rarely, 

 pointed at the apex, more or less spreading, sometimes curved. 

 Nerves parallel, simple or dichotomously divided. 



This genus is one of the earliest of Cycadean fronds, appearing 

 first in the Carboniferous, and reaching its maximum in the 

 Triasso-Rhaetic. In the Jurassic and Cretaceous rocks it is less 

 abundant. 



Pterophyllum (Anomozamites) Balli (Feistmantel). 



(Text-fig. 45.) 



1881. Anomozamites (Pterophyllum) Balli, Feistmantel, Rec. Geol. Surv. 

 India, vol. xiv, pt. 3, p. 2.36, pi. ii, figs. 3, 4. 



