290 Transactions. — Botany. 



cumstances this name would be quite inax^propriate, I have 

 named it Pottia grata. 



According to my usual practice, my drawings of the mosses 

 described below are to one scale, to facilitate comparison. 

 In this genus it will be found specially valuable on account 

 of their minuteness. 



I have drawings of a few more plants which belong to 

 this genus, but as I have mislaid my specimens I think it 

 unwise to publish them until I have been able to compare 

 further. 



The following arrangement of the species places them in 

 their nearest relative position to each other : — 

 Pottia areolata, Knight. 



„ acaulis, nov. sp. 



„ alfredii, nov. sp. 



„ wrightii, nov. sp. 



„ stevensii, nov. sp. 



„ serrata, nov. sp. 



„ longifolia, nov. sp. 



„ bickertonii, nov. sp. 



„ macrocarpa, 7iov. sp). 



„ douglasii, nov. sp. 



„ leonardi, nov. sp. 



„ grata, nov. sp. 



„ assimilis, nov. sp. 



„ obliqua, nov. sp. 



Pottia acaulis, nov. sp. Plate XXXI. 



Plants minute, annual, almost stemless, simple, growing in 

 small patches, gregarious. Leaves few, spreading. Upper 

 stem-leaf -^^in. long, oblong, rounded at the apex into a short 

 acuminate point, concave. Margins entire. Nerve nearly 

 continuous. Areola large ; upper pentangular ; loioer oblong- 

 quadrate, crisp when dry. Perichcetial leaves -aV^- ^o^g> 

 oblong-obovate or subspathulate, rounded into an acute point. 

 Friiitstalh -j^in. Capsule small, ovate, symmetrical. Peri- 

 stome none. Operculum conico-rostrate, slightly oblique, about 

 two-thirds of the length of the capsule. Calyptra cucullate. 



Hab. On limestone rocks, at Castle Hill ; and on Port Lyt- 

 telton Hills, on clayey banks. Collected by E. B. 



Pottia alfredii, nov. sp. Plate XXXI. 



Plants small, annual, growing in dense patches. Stem 

 about ^in. long, unbrauched. Leaves densely imbricating, 

 numerous ; upper nearly erect, loiver spreading, shortly ob- 

 long-lanceolate, acute or apiculate, incurved near the apex, 

 concave. Margins entire, recurved to near the apex. Nerve 

 stout, excurrent, or ending at the apex. Upper areola slightly 



