82 BRITISH FERNS. — SUB-ORDER II. TRIBE 9. 
Group II. Truncate. 
Section a. TRUNCATUM. (Ending abruptly.) 
1. accisum, Lowe. Found in Devon ; and recently at Carron, by 
Mr. P. B. O’Kelly. 12XI5 inches. Normal, except at the apex, 
which terminates in a leafy frill within the frond. 
2. constrictum, Moore. Found in Guernsey by the late Mr. 
James. 6x ii inches. Depauperate ; and naked to stem m centre. 
Very irregular, laciniate, and slightly marginate. . 
3. corniculatum, Lowe. From the late Colonel Jones s collection. 
8x1 inches. Truncate, cornute, rugose (except a broad fiat 
rachis) ; the rugose margin i-inch thick. St ‘P es > 4? in c h es. _ 
4. cornutum, Lowe (truncato-cornutum, Mapplebeck). Raised 
in 1872 by Mr. Mapplebeck. 9^X2^ inches. Frond terminating 
in a horn ip inches long. No pouch. Found also in the Lake 
district by Mrs. Hodgson and Mr. J. Crossfield. One raised by 
myself is 6x2 inches ; with wavy margin 
e. obtuso-dentatum, Moore. Found in 1855, near Ilfracombe, by 
Rev. J. M. Chanter. i2Xij inches. Apex blunt, margin having 
uniform dentate crenatures. , , , , , 
6. O’Kelly i, Lowe (truncation, O Kelly). Found at Blackhead 
by Mr O’Kelly, where he also found another small rotund form. 
7. reniforme, Williams. Found in several localities. 4x2 
inches. Abrupt and kidney-shaped. Mrs. Grant has the best form. 
8 . significans, Lowe. Raised by myself. 5X inches. Rugose 
and truncate. . , _. . , „ 
9. subcornutum, Tail. 8 x 1 inches. Rigid. Crenate ; apex 
abruptly rounded. Cornute. 
10. supra-cornutum, Lowe. Horned above. _ 
11. truncatum, lvery. Not uncommon. A nice form has been 
found at Black Head, Co. Clare, by Mr. P. B. O’ Kelly. 
Sub-section. PERAFERENS. (Bearing a pouch.) 
1. acetabulum, Lowe. Raised by myself. A shallow cup at 
apex, and there supralineate. I 2 X 2 | inches (of which 7 is the 
2. anomalum, Lowe (perafero-anomalum, Mapplebeck). Raised 
by Mr. Mapplebeck in 1872. 8X if inches ; stipes 4 inches long. 
Pouch muricate, but frond smooth. 
3. crispissimum, Lowe. Raised by myself. \\ avy in a crispum- 
like manner. . r 
4. excurrens, Moore. Found in 1864, at Whitbarrow, by Mr. G. 
Stabler. Horned on the upper side. , _ , , _ 
5 fimbriatum, Lowe (marked 102 in the late Colonel Jones s 
collection). 6 X iP inches. The edges of the cup fringed ; cornute. 
Mr. W. H. Phillips found a similar form at Gormanstown. 
6 incurvare, Lowe. Raised by myself. 10 X if inches. Costa 
dividing 2 inches from the apex, forming an imperfect pouch at 
the top, which faces the front of the frond. There are two horns 
at the base on the underside bearing sori. 
