96 MB. W. MITTEN ON THE MOSSES OF 



M. crispulus. (Hookeria, Hook.Jil. et Wils.) 



Hah. Tasmania, rivulet behind the Sawpit, Smith's Creek, Mr. Archer. 



9. Pteeygophtllum, Brid. 



P. nigellum, Hook.Jil. et Wils. 



Hah. Tasmania, rocks in rivulets and creeks, Mr. Archer. 



P. OBSCURUM {Mitten). Caule bi- tri-pollicari latitudine cum foliis 

 fere trilineari parce ramoso, foliis disticho-compressis lateralibus pa- 

 tentibus late elliptico-spathulatis angulo apicali obtuso basi angus- 

 tatis intermediis patentibus dimidio brevioribus subtrapezoideis ob- 

 tusis duobus cauli parallelis mediis dorsalibus et ventralibus ere(!tis ap- 

 pressis late obovatis apice rotundatis omnibus foliorura nervo ad me- 

 dium brevi-furcato evanido marginibus superioribus crenulato-serratis 

 cellulis partis superioris circiter -^^-^ uncise diametro raetientibus. 

 Hah. Tasmania, Clieshunt, Mr. Archer. 



Whole plant obscure blackish green. AUied to P. denticulatum and 

 P. nigellum, but with its lateral leaves very much narrowed towards the 

 base, and these, as well as the intermedial and medial, of a different 

 form. The species of this genus, from neglect in the descriptions of 

 the very different forms of their leaves in the several series, are hardly 

 intelligible. 



XV. Htpopteetgiaceje. 



1. Ctathophoeum, Brid. 



C. bulbosum. (Anoectangium, Hedw.) 

 Hah. Tasmania, Cheshunt, Mr. Archer. 



2. Hypopterygiitm, Brid. 



H. Novae-Zelandise, C. Muller, Bot. Zeit. 1851, p. 562. (H. Smithi- 



anum, Hook.Jil. et Wils. in Fl. New Zealand.) 

 Hab. Tasmania, on Uving trees. Western Creek, and by rivulets, 



Mr. Archer. 



H. Struthiopteris, Brid. (Lopidium pallens, Hook.Jil. et Wils. in Fl. 



New Zealand.) 

 Hah. Tasmania, in creeks, Mr. Archer. 



XVI. Buxbaumiace^. 



1. BUXBAUMIA, Hall. 



B. Tasmanica (Mitten), B. indusiatce simillima, foUis parvis cihatis, 

 pedunculo nitido subscabro, theca suberecta ovata superficie supe- 

 riore planiuscula immarginata inferiore convexa, operculo conico. 



Hah. Tasmania, Cheshunt, Mr. Archer. 



