LINAIUA CYMEALARIA. 203 



[The above paper and accompanying drawings were circulated 

 with a box of sUdes round the Postal Microscopical Society during 

 the years 1882 — 3; therefore, by way of addenda to the paper, we 

 think it well to add some of the notes which were written by mem- 

 bers in further description of this interesting little plant. — Editor?\ 



ADDENDA. 



I would suggest that the slide of hairs of the corolla should 

 also have been mounted in balsam, so as to admit of polarisation. 



E. E. Jarrett. 



It is really vonderful how this plant adapts itself to its envi- 

 ronment. I have grown a plant of Linaria cymbalaria in an 

 enclosed glass porch, and have been surprised to find here and 

 there a small plant springing into existence, showing into what 

 minute and dry crevices the seeds find their way, and at consider- 

 able distance from the parent plant, and where they are utterly 

 devoid of water. J. H. Wilson. 



It is to be hoped that the confession made by Mr. Moore, 

 p. 197, that he has never come across a specimen with the white 

 corolla since taking away the whole of the plants with their roots, 

 may lead some collector to be more merciful than they sometimes 

 are when they come across a rare specimen. Let them, at least, 

 leave the root. James C. Christie. 



We are told on ]). 201 that there are no stomata on the upper 

 cuticle. I think another examination would show several large 

 and well-defined stomata there. W. Swallow. 



There is one point respecting the presence of stomata on the 

 upper side of the leaf, which appears to have been overlooked by 

 Mr. Moore on p. 201. Although very much fewer in numbers than 

 on the underside, they exist, as remarked by Mr. Swallow, and I 

 also find that the outline of the cells of the upper cuticle is some- 

 what like that of the cells of the under cuticle — viz., more or less 

 sinuous or wavy, not so markedly so as on the under side, but 

 much more so than is shown in Eig. 9. Geo. D. Brown. 



Not the least valuable of Mr. Moore's observations are those 

 bearing on the structure of the stalk of the seed-vessels. I think 

 there is little doubt that his explanation of the peculiar behaviour 



