POI.YSTirill'M ACULEATUM. 



203 



IxTERRUPTCM, Lowe. (Fig, 161.) — Found in Xoith Devon- 

 shire, by the Rev. F. Mules. Length of frond twenty-four 

 inches, width five inches in the widest part. Pinnae narrowing 

 to the base, alternate, normal at the base for the first four or 

 five pairs of pinnte, then half a dozen pairs of pinnae with 

 linear or almost wanting pinnules, above which normal to the 

 apex. Pinnules but slightly auricular, with a much longer 

 superior basal pinnule. In the interrupted portion the pinnules 

 are scarcely more than the footstalks along the rachides. I am 

 indebted to the Rev. F. Mules for fronds. 



Fig. 162. — Upper pinna, and lower pinna. 



Cristatum, Moore. (Fig. 162.) — Found at Barnstaple, by 

 Mr. H. F. Dempster. In this variety the pinna? are pinnate on 



2 E 



