










222 THE BRITISH FERNS. 
being longer and more bristly than usual. When originally found 
its pinnules were somewhat depauperated, distant and confluent, but 
these features have not been permanent. It was found by Mr. R. 
Sim, at Chislehurst, Kent. 
4. nana (Sim). This also belongs to the spinulosa type, and is 
described by Mr. Sim as being about six inches high, and constant 
to its dwarf pigmy character. 
5. crispa (M.). This also belongs to the spinulosa type, and has 
been recorded by Dr. Deakin, in the Florigraphia Britannica (iv. 108, 
figs. e, f, on p. 111). Itis described as being very rigid, the margins 
of the lobes of the pinnules closely rolled back, and partly con- 
cealing the sori; they are said to be so rigidly curled back as to be 
retained flat with great difficulty when unrolled. The sori are 
larger and much darker than in the usual forms of spinulosa. It 
was found near Sheffield in Yorkshire. 
6. interrupta (M.). A slight variation of the spinulosa type, in 
which the pinnules are irregularly developed; here and there de- 
pauperated, and in some parts enlarged and broader than usual. 
It was found at Malton, Yorkshire, by Mr. Monkman. 
7. tripinnata (M.). A very elegant form of the spinulosa type. 
The fronds are narrow, stiff, erect; the pinne short, and the pin- 
nules small, but the anterior and posterior ones unequal as in the 
most marked forms of spinulosa ; the pinnules are, however, distinctly 
divided into little oblong obtuse lobate-serrate or biserrate pinnulets. 
The general aspect of the frond, is that of being made up of a 
multitude of little parts. It was purchased of a Fern hawker by 
Mr. F. C. Wilson, of Stamford Hill. 

