FLORA OF THE DEVONIAN. 



555 



and eraarginate at the apex, 1"5 inch broad, and one inch long, with 

 a large broadly oval acuminate nucleus, and the usual mesial line. 



We have thus four distinct species of these mysterious winged seeds 

 from the Devonian. They must have been fruits of trees, but whether 

 of pha^nogams, or enormous winged spore cases of some cryptogamous 

 plant, is uncertain. Their marginal wings show no venation what- 

 ever, though preserved in shales which show very well the venation 

 of ferns. The margin must have been membi'anous, and the nucleus 

 thick and dense, that part appearing as a comparatively strong graphitic 

 film, while the wing or margin is excessively tenuous. 



Fig. 194. — Devonian Fruits, etc. 



^ m A 



A, Cardiocarpum comutnrn. 



B, Cardiocarpum aciituni. 



C, Cardiocarpum Crampii. 



D, Cardiocarptmi Kaileyi. 



E, Trigoiiocarpum racemosum. 

 (E',_E-.) Fruits enlarged. 



F, Antliolithes Devonicus. 



G. Annularia acuminata. 



II, Astorijplijllites acicularis. (II'), Leaf. 



II-, Fruit of tlie same. 



K, Cardiocarpum (? young of A). 



L, Pinuularia dispalans. 



Trigonocarpum racemosum., Dawson (Fig. 19i, E). Ovate, ob- 

 tusely acuminate, in some specimens triangular at a[)cx. In flattened 

 specimens the envelope appears as a wing. Attaclied in an altornato 

 manner to a thick, flcxuous, furrowed rachis. This is evidently a 

 fruit or seed, borne in a racemose manner on a stout rachis. In 

 some specimens the seeds are close to each other, in otlicrs more 



