298 TrcmsacHons.— Botany. 



small cellular tissues. I have not seen this plant, but from its 

 description am of the opinion that it belongs to the latter 

 genus. A reference to the figure given also confirms my idea. 

 I do not therefore propose to treat it as a Gymnostomum. 



G. areolatum. — This moss is also in much the same position 

 with regard to its genus as G. sulcatum. The large cellular 

 tissue described as belonging to this plant, and the drawing 

 thereof, show that it is a true member of the genus Pottia, 

 which is composed of annual or biennial plants, having large 

 cell-structure. I therefore propose to place this moss in the 

 latter genus. 



G. angustatum. — I was under the impression that I had 

 discovered this moss, but on closely examining my specimens 

 I found traces of sixteen teeth, and, although it corresponded 

 in every respect with Mr. Knight's description of G. angusta- 

 tum, with the exception of these teeth, it therefore could not 

 possibly be the same moss. 



The following is the proposed arrangement of the species 

 of this genus as discovered to date : — 



Gymnostomum calcareum, Nees and Hornsch. 



„ var. intermedia. Knight. 



tortile, Sclnoagrichen. 



patulum. Knight. 



knightii, Schimper. 



angustatum. Knight. 



pygmaeum, nov. sp. 



ligulatum, nov. sp. 



waimakaririense, nov. sp. 



magnocarpum, nov. sjj. 



stevensii, nov. sp. 



longirostrum, iiov. sp. 



wrightii, 7iov. sp. 

 „ var. A. 



Gymnostomum pygmaeum, nov. sp. Plate XXXV. 



Plants very small, perennial, growing in dense patches. 

 Stem extremely short, branched. Branches fastigiate, gVin- 

 long. Leaves minute, erecto-patent or erect, linear-lanceolate, 

 acuminate. Margins entire. Nerve faint, disappearing 

 below the apex. Lower areola oblong, quadrate ; upper 

 small, crisped when dry. PerichcBtial leaves half as long 

 as the upper-stem leaves, erect, entire, otherwise similar 

 to the stem-leaves. Fruitsialk inclined, xijin. high. Capsule 

 ovate, symmetrical. Mouth narrowed. Peristome none. 

 Operculum oblique, conico-rostrate, two-thirds length of cap- 

 sule. Calyptra cucullate. 



Ilah. Damp limestone rocks, near Castle Hill. Collected 

 March, 1891, by K. B. 



