ON RADULA CARRINGTONH. 141 



Iriends, published it as var. major of Radula aquilegia. Lately the 

 male plant having been found amongst specimens collected by the 

 late Dr. Moore, of Dublin, and the late G. E. Hunt, of Man- 

 chester, which clearly show its specific difference from Radula 

 aquilegia, Dr. Carrington was preparing to publish it as a distinct 

 species, when Herr Jack wrote that he had nearly ready a mono- 

 graph on the European Badulm, and that in it he had raised the 

 Radula aquilegia, Tayl., var. major, Carringt., to specific rank as 

 Radula Carringtonii. 



From Jack's monograph I add the following translation : — 



" Radula Carringtonii grows in close patches of an olive-green 

 or brown colour. The stems are from 4 to 5 centimetres long, 

 irregularly pinnate, with somewhat ascending branches. The 

 leaves imbricate one another, and are almost flat, margin entire ; 

 the superior lobe stands off obliquely from the stem, is rotundate 

 almost reniform, 0-8 mm. long and 1*3 mm. broad, whilst the 

 diameter of the chief stem and the broader branches reach to 2-4 

 mm. The lobule reaches hardly to half the length and breadth of 

 the superior lobe, with which it forms a sharp angle, and upon 

 which it lies flat. The same is quadrate, or more or less trapezi- 

 form. The female involucral leaves are oblong-oval, with oval- 

 rotundate lobules f as large. Archegonia 7-8. 



" Radula Carringtonii has in common with Radula aquilegia the 

 olive-brown colour which is wanting with the European species, 

 but it differs from the last in wanting the characteristic form of 

 lobule, which is by Dr. Taylor especially pointed out, namely, the 

 strong swelling of the same along its base. With Radula aquilegia 

 the lobule forms with the superior lobe quite an obtuse angle, 

 which is obliquely extended broader than high, and its. obtuse 

 corner is sideways directed. With Radula Carringtonii the lobule 

 forms with the superior ones an acute angle, and appears as an 

 almost flat towards above, and below mostly somewhat irregular 

 quadrate. Further, with Pi. aquilegia, the branches stand off the 

 stem almost at right angles, and the leaves are forwardly directed. 

 The opposite circumstance is found with Radula Carringtonii, with 

 which the branches are a little forwardly directed, but the leaves 

 stand off obliquely. This last one resembles mostly Radula com- 

 planata, but is distinguished from it by its dioicous character and 

 the olive-brown colour." — Jack, in Flora, pp. 384-5, 1881. 



Dr. Carrington, whom I have to thank for specimens of the 

 plant, kindly furnishes the following additional notes : — 



" The female is not unfrequent, but hitherto in a barren or 

 immature state, and the colesule is unknown ; it occurs in wide 

 closely imbricated patches on rocks or trees of a translucent amber 

 or olive-brown colour, and with an oily lustre. From Ft. co)n- 

 jAanata, which it resembles in size and form, it is at once distin- 

 guished by the dull pale glaucous leaves and the monoicous in- 

 florescence of that species. The shoots are irregularly pinnate or 

 bipinnate, the branches alternate and generally short. 



" From Fi. aquilegia, to which it approaches nearly in habit, 

 it may be known by the larger size, and by the less convex elliptic- 



