Moore — On the Mosses of Ireland. 
377 
Leaves long, loosely inserted, cirrhate when 
dry, . 27. T. hibernica. 
Leaves with margins sinuous on upper half, 28. T. sinfosa. 
Leaves linear, very fragile, and easily 
broken off, 29. T. pea gilts. 
Leaves squarrose, and slightly undulated, . 30. T. squaeeosa. 
1. T. lamellata (Lindberg). Om. de. Europeiska Trichostomese, 
p. 23. Helsingfors, 1864. Schimper, Synopsis, p. 122. 
Eabenhor., Bryothec. Europ., No. 8 1 9. Gymnostomum ova- 
tum, var. S. gracilis, Wils., Bryol. Brit., p. 93. G. ovatum, 
var. p., gracilis, Hook, and TayL, Muscoi. Brit., Ed. 2, p. 2. 
Hab. On the tops of mud walls, &c. Abundant in many places near 
Dublin, but not of general occurrence elsewhere in Ireland. 
This rather singular moss, which forms an intermediate link 
between the genera Pottia and Tortula, has quite the aspect, 
when growing, of other species of the latter genus, and very 
unlike the normal state of Pottia ovata, of which it has so long 
been considered a variety. It is, however, always gymnosto- 
mous in this country. In a young state the appearance of 
teeth may sometimes be seen through the lid of the capsule. 
2. T. rigida (Schultz). Eecens. Gen. Barbula, et Syntrichia, tab. 32, 
f. 1. Bryol. Brit, p. 120, tab. 32. Eabenhor., Bryothec. 
Europ., E'o. 235. Briol. Ital., p. 529. Barbula rigida, Bryol. 
Europ., vol. II. Monogr., p. 13, tab. 137. Schimp., Synops. Mus- 
cor., p. 36. 
Hab. On the tops of walls. N'ear Chapelizod, Cardiff's Bridge, on 
Eoyal Canal, and other places near Dublin; also near Cork ; 
but rare elsewhere in Ireland. 
3. T. amUgua. (Wils.). Bryol. Brit., p. 120, tab. 42. T. rigida. 
Turner, Muse. Bib. Spicil., p. 43. El. Hib., p. 25. Bryol. 
Europ. Monogr., p. 14, tab. 2. Lindberg, Europ. Trichost., 
p. 25. Barbula ambigua, Eabenhor., Bryothec. Europ., No. 226. 
Hab. On the tops of walls. Abundant near Dublin and Cork. In 
El. Hib. T. rigida, and following species are confounded 
with this one. 
4. T. abides (Koch.) DeNotr., Muse. ItaL, 1, p. 1 5, tab. 1 . Briol. Ital., 
p. 528. Bryol. Brit., p. 121, tab. 42. Barbula aloides, BryoL 
Europ., vol. II. Monogr., p. 15, tab. 139. Lindberg, Europ. Tri- 
chost., p. 26. Eabenhor., Bryothec. Europ., No. 786. 
B, I. A. PROC. — VOL. I., SER. II., SCIENCE. 
