JONES — ON SPIRAL VESSELS IN EVERNIA PEUNASTBI. 179 



sometimes an apparently transverse (" annular"), or, when the angle of 

 the vessel rendered itself especially evident, a sub-scalariform appear- 

 ance; but he thought, nevertheless, that the fibres were throughout 

 actually spiral (see Figs. 8 and 9). Mr. Archer adverted to what ap- 

 peared to him to be a singularity of the vessels forming these vascular 

 bundles. This was, that not unfrequently certain (sometimes several) 

 vessels, running up and down, parallel with the other vessels of the 

 bundle, upon meeting, did not overlap, but suddenly diverged at right 

 angles from the rest, and were prolonged concurrently in a direction 

 vertical to them, and parallel and juxtaposed to one another, the entire 

 bundle thus forming somewhat the figure of a T (see Figs. 9 and 1 0). This 

 seemed to be something different from the bundles merely giving off what 

 might be called branches, or simply divaricating. He ventured on this 

 observation for information's sake, and would leave to those acquainted 

 with the histology of the higher plants the decision as to whether this 

 was a circumstance of special singularity or weight. He thought, then, 

 that this seemingly unusual arrangement, coupled with the apparent 

 completeness and intimacy with which these vascular bundles were im- 

 mersed in the brown indefinite cellular mass, whatever may have been 

 its origin, seemed to point to the conclusion that they actually belonged 

 thereto, or at least were found in it, and were not accidental foreign in- 

 truders during the manipulation, which latter assumption, indeed, Ad- 

 miral Jones's well-known scrupulous care would d priori forbid. This 

 assumed, then, notwithstanding that Admiral Jones's researches had not 

 disclosed any more of these spiral vessels, the observation thus recorded 

 seemed of very great interest, and, as far at least as it went, noteworthy 

 in a very high degree. 



Dr. Grimshaw coincided with Mr. Archer that the circumstance of 

 the vessels forming the bundles standing out at right angles from the 

 rest, in the manner which had been drawn attention to, was singular, 

 and he was not aware of a similar instance. 



Dr. Moore exhibited English specimens of Roccella fuciformis, ga- 

 thered by Miss Acton, of West Aston, "Wicklow, at Bolt Head, Devon- 

 shire. It would be interesting to compare the forms which presented 

 themselves in Miss Acton's collection with that gathered by the Presi- 

 dent at Blasquet Island, and adverted to by him at the last meeting of the 

 Society. This lichen, which was also a Mediterranean plant, had hi- 

 therto been found as British only in the Channel Islands ; therefore the 

 Irish habitat was very interesting. 



Admiral Jones pointed out the assumed distinctions of the three so- 

 called species of Boccella, all of which occurred in the collection made 

 by Miss Acton, and gave it as his opinion that they were untenable. 



