XXI] 



MATONINEAE 



357 



Matonia pectinata. Zeiller^ first established the practical 

 identity of the sori and sporangia of Laccopteris and Matonia. 

 The Rhaetic species, such as L. Muensteri, L. elegans, and L. 

 Goepperti, agree very closely with L. polypodioides and need not 

 be described in detail. 



Fio. 264. Laccopteris elegans (Presl). (From a specimen in the British 

 Museum ; from the Lower Keuper of Bayreuth, Germany. Nat. size ; 

 part of pinnule x 3.) 



The Rhaetic species Laccopteris elegans, represented in 

 fig. 264, illustrates the characteristic habit of the genus and 

 shows a feature usually overlooked-, namely the occurrence of 

 anastomoses between the lateral veins. The form of the sorus 



1 Zeiller (85). 



2 Seward (99=) p. 194. 



