Mi'sozoic p]>AXT.s rKo:\r ciif.va. 13 



DESCRIPTION OF THE SPECIES. 



I. TRIASSIC PLANTS. 



A. T'ang-t'ang, Hsiian-wei-Chou. 

 Yun-nan-Shêiig.'^ 



1. ANGIOFTERIDIUM CFR. INFARCTUM ] kistm. 

 PL I. Figs. 1-7. 



Aiujiopicrldunn iiijantain V\:i>yyi\yTiA., Flora of tlie Danuida and Panchot 

 Divit-ioii«, \K "J."), pi. XXX1\'A, Fi^s. 4, 5, öa. 



We have several fragments of isolated pinme of a fern which 

 evidently belongs to the family of T(vn'w2')ieridcc. They are oblong- 

 linear in shape slightly tajR'ring buth above and below. The 

 apex is quite rounded, while the base nariows abruptly. 'J'he midrib 

 is moderately strong, straight and evanescent. The secondary 

 veins are fine, numerous, dense and parallel. They rise from the 

 midrib at an angle of 40°-45°, and then curving outward go 

 obliquely to the margin of the pinna. Forking generally takes 

 place close to the midrib, but further on, the veins remain 

 mostly simjjle. 



The greatest l)readth attained by our s])ecimens is 3() mm., 

 but the length is not known. The density of the veins is about 

 4 to a millimeter. 



The species, to which this Chinese form shows the greatest 

 resemblance, is the one above named from the Triassic of 



