64 BRITISH M088E8. 



I. Leaves lanceolate, acute, no distiiict j)erichcetium, teeth of 

 peristome variable. 



Fig. 9. Weissia conteoversa. 



Controverted Moss (a) . 



Colour. Bright green. 



Stems. Half-inoli longj branched. 



Leaves (b) . Lanceolate^ nerve strong, excurrent, margin curved inwards. 



Capsule. Oblong-oval, nearly erect ; seta twisted when dry. Spring. 



Locality. On banks. 



A new species of moss has been discovered by Mr. Wilson near Holyhead, 

 between Oymnostomum tortile and Weissia controversa, and it is probable that the 

 genera may in time be re-arranged. 



Fig. 10. Weissia densipolia. 



Thich-leaved Weissia (a.) . 



Colour. Bright green. 



Stems. Half-inch long or more, often branched. 



Leaves. Lanceolate, very thick, longer and stouter than in controversa; nerve 



strong, excm'rent. 

 Capsule. Oblong, nearly erect, seta twisted, longer than in controversa. Spring. 

 Locality. Banks. 



It is doubtful whether this moss is a variety of controversa or a distinct species. 

 W. Controversa has many varieties, and it and the two last species of Gym- 

 nostomum are sometimes only distinguishable by the presence or absence of the 

 peristome, which in the variety W. Gymnostomoides (naked-mouthed) is almost 

 wanting. 



