180 



The Naturalist. 



4ft. 6iii. Among its localities are Strensall, Langwith, Stockton^ 

 Skelton, Overton, Askham, Castle Howard, &c., &c. The following 

 varieties have been identified with more or less certainty : incisa, 

 Acomb Wood (B. B. L. T.) ; oUusum and odontoma7ies, Langwith ; 

 rhcBticum, Strensall Common. 



Scolopendrium vulgare. — Very rare, near Acomb and Bishopthorpe ; 

 very small on an old wall near Lendal Bridge. On the 30th of Sep- 

 tember, 1875, we found a number of seedlings growing under the 

 mill-arch at Naburn, where the spores had doubtless been floated, as 

 the plants were below the level of the highest water. Mr. H. T, 

 Mennell (Observer, vol. ii., p. 138) found it at Heslington, and other 

 Bootham collectors at Hobmoor in 1852 (Observer). I found a small 

 plant which had the edges of its leaves notched, on the city walls by 

 the Victoria Bar. These are all in Mr. Baker's Drainage District 

 No. 1, from which there were previously no records ; its distribution, 

 therefore, is now general in North Yorkshire. 



Cystopteris fragilis. — Sutton-on-the-Forest (H. Ibbotson). Mr. Baker 

 also gives it as occurring in his district. No. vi. 



Aspidium aculeatum. — Though common to all Mr. Baker's drainage 

 districts it is rare near York. Its localities are — near Strensall, Lane 

 beyond Clifton, by the north road near Skelton, Colton Hagg, Wig- 

 hill, Askham Richard, Healaugh, and on the 30th of March, 1877, I 

 discovered a quantity on the edge of Overton Wood. I believe the 

 var. lobatum occurs among the rest in the last named spot, also at 

 Askham Richard (B.B.L.T.), Strensall, Colton Hagg, and Wighill. 



Aspidium angulare. — Occurs in all Mr. Baker's districts except No. i, 

 but very rare near York. Castle Howard (H. Ibbotson.) 



N epJir odium fiUx-mas.—k. very variable and very abundant species, 

 Knavesmire Wood, Langwith, Askham, Strensall, Castle Howard, 

 Overton, and most other places. Not unfrequently it grows on walls, 

 in which position it takes a very diminutive form, the fronds being 

 seldom over four inches long. I have found it so on a railway arch 

 near Skelton Wood, on the back of the Castle, and in more than one 

 spot on the walls. Young fronds seem to be coming up all the year 

 round. On June 2nd, 1877, I found in Langwith Woods a frond 

 which had a very curious appearance, from having been checked by 

 frost. Many of the lower pinnae were very diminutive, and brown, 

 being scarcely an inch long, while those above were perfect, having 

 grown since the lower ones were cut. The following named varieties 

 have been more or less correctly identified ',—palccacea, Acomb Wood, 

 Askham, &c. ; jjrodiivta, Acomb Wood ; dtjorme, lane near Stockton ; 



