BY L. RODWAY. 89 



PLEURIDIUM, Brid. 



Plants small, erect, simple or nearly so. Leaves lanceo- 

 late from a broad base, smooth and glossy ; nerve relatively 

 broad, excurrent; cells irregular, oblong-fusiform, rectan- 

 gular below. Capsule oblong, globose, apiculate, smooth, 

 on a very short seta, not forming a lid ; calyptra small, 

 cucullate. 



PLEURIDIUM GRACILENTUM, Mitt. 



Slender, 3-6 m.m. Lower leaves erect, distant, small, 

 upper ones long, slender from a narrow ovate base, 2-5 

 m.m. forming a coma; margin obscurely serrulate; nerve 

 well developed ; cells very irregular, oblong-fusiform, rec- 

 tangular below. Capsule broadly oblong, bright brown, 

 shinino-, 0.5 m.m. 



On the ground, Macquarie Plains, Clieshunt, etc. 



PLEURIDIUM TENELLUM, Mitt. 



Pale brownish yellow, 3 m-m. Lower leaves very small, 

 upper leaves slender from a broadly ovate base, 1.4 m.m., 

 foiTiiing a coma; margin nearly plain; nerve broad; cells 

 regularly oblong-fusifomi, incrassate, quadrate below. Cap- 

 sule globose, pale red, glossy, 0.5 m.m. 



Cheshunt, Domain, Hobart. 



CERATODON, Brid. 



Small, in csespitose tufts. Leaves lanceolate, acute; 

 nerve narrow, bold, lost in the apex to shortly excurrent; 

 cells small, quadrate, smooth, larger. and rectangular below. 

 Capsule fusiform with a minute bulbous neck, slightly arcu- 

 ate, sulcate when diy ; lid short, conic ; calyptra long, nar- 

 row, cucullate; peristome teeth cleft to the base into two 

 long slender legs, closely articulate below, remotely so 

 above, papillose, involute. 



The genus may be considered intermediate between 

 this familv and Tortulaceae. 



