SUB-SECTION POLYSTICHUM. 
125 
10. Glenarmense, Lowe (interruptum Glenarm, Praeger). Found 
in 1884, in Glenarm, by Mr. Praeger. 20x5 inches. Not much 
depauperated. Very thorny. [A second form, found in the same 
place, is distinctly tripinnate. 13 X4^ inches.] 
n. gracile, Lowe. A gracile-like interruption. Found at Bally- 
meux by Mr. W. H. Phillips. 
12. grandidens, Wollaston. Found in 1872 in Dorset by Mr. J. 
Wills. Everywhere depauperate. 20 x 1 inches. A number of 
kindred forms have been found. 
13. interrupto-caudatum, Praeger. Found in 1885, in Glenarm, 
by Mr. Praeger. 21 x 7 inches (at base) ; only an inch in upper 
half of frond. 
14. interruptum, Wollaston. Found in Hampshire, in 1862, by 
Mr. Rake. Length, 18 inches. A most interrupted form ; some 
pinnae 4 inches long, others not £ an inch ; most of the pinnae are 
not an inch in length. 
15. irregulare, Jones. Found at Ballymenoch by Mr. W. H. 
Phillips. 12 xi inches. Much depauperated and truncate. 
16. laciniatum, Wollaston. A form of interruptum. 
17. Lowei, Lowe (grandidens Lowei, Moore). Very dwarf and 
fine-cut, the pinnules being acutilobe. Truncate. Length, 4 to 6 
inches. 
18. magnum, Lowe. A giant amongst laciniatums. Found at 
Mequale Bramel, Co. Down, by Mr. W. H. Phillips. 3 0x7 inches. 
19. manica-infanta, Wollaston. Pinnules contracted like a baby’s 
sleeve. Found at Offwell, Devon, by Mr. Moly. 13x4 inches. 
20. Phillipsii, Lowe (interruptum Phillips, Wollaston). Found 
in 1876, in Co. Down, by Mr. W. H. Phillips. 24x7 inches. 
Towards the apex pinnae suddenly shortened ; pinnules much 
depauperated ; lax. General outline of frond symmetrical. 
21. Praegeri, Lowe (grandidens Praeger). Found in 1881, in 
Graigavad, by Mr. Praeger. 20 x inches. A bold, truncate 
grandidens. 
22. praemorsum, Allchin. Found in Ireland, in 1853, by Dr. 
Allchin, and subsequently in Devon and Hants. Dwarf, narrow, 
praemorse variety. 14x3^ inches. Mr. W. H. Phillips found a 
form at Knock, 24 x 4^ inches. 
23. Strictum, Jones (interruptum, Barnes). A good form. 
24. Thompson!, Lowe (grandiceps Thompson, Jones). A curious 
very narrow grandiceps ; with abrupt pinnae, and with larger con- 
fluent ones. 14x1 inches. A slender laciniate head, 2 inches 
wide. Distinct. 
25. truncatum, I .owe (grandidens truncatum Ehvorthy, Wollas- 
ton). Found in 1859, in Somerset, by the late Mr. Elworthy. Pinnae 
and apex truncate ; pinnules very abnormal. 7X i| inches. 
Section 8. SETOSUM. (Pinnules thorny.) 
1. cristatum, Lowe (setoso-cristatum, Moore). Found in 1874, in 
S. Devon, by Mr. J. Moly. Apex of pinnae slightly crested, and 
a compact, much-branched head, not wider than the frond. This 
