XXVIl] 



CALLIPTERIS 



557 



Callipteris. 



Brongniart^ instituted this genus for certain species of 

 supposed fems previously referred to the genera Pecopteris, 

 Alethopteris, and Neuropteris. Callipteris is a characteristic 

 Permian plant which is almost certainly a Pteridosperm. 



B 



Fio. 366. A. Odontopteri$ genuina (Giand'Enry). ( x 2f . After Benault and 

 Zeiller.) 



B. Callipteridium gigas (Outb.). ( x 2f . After Zeiller.) 



C. Callipteris Pellati (Zeill.). ( x If. After Zeiller.) 



D. 'C. hjratifolia (Goepp.). (x If. After Zeiller.) 



Zeiller has pointed out that such descriptions of fertile specimens 

 as have been written are unsatisfactory. A few years ago, how- 

 ever, Grand'Eury ^ recorded the occurrence of seeds in association 

 with Callipteris fronds in the Autun district, and in some cases 

 they were found attached to the pinnae and rachis. The seeds 

 are ovoid or spherical (5 — 10 mm. broad) and smaller than 



Brongniart (49) A. p. 24. 



Grand'Eury (06). 



