368 Proceedings of the Royal Irish Academy. 
annually among tlie plants in tlie Glasnevin Botanic Garden, but 
I have not met with it in the north or west of Ireland. In its 
normal form the peristome is furnished with 16 teeth, in which 
state it always occurs near Dublin. Mr. Mitten, however, 
states that the peristome in this respect is very variable, 
some forms being gymnostomous. 
6. P. trvncata (Br. et Schimp.). Bryol. Europ., vol. ii., Monogr., p. 
9, tab. 120-121. Bryol. Brit., p. 94, tab. 7. Gymnostomum 
truncatum, j^ecs et Hornsch. Bryol. Germ., tab. 9, f. 8. 
Muscol. Brit, Ed. 2, p. 22, tab. 7. 
Hab. Fallow fields, banks and moist grounds all through Ireland. 
This common moss varies much in its forms, and in the length 
of the capsule, compared to its breadth, as well as in the lid. 
The variety /3. major — Gymnostomum intermedium, of Turner, 
Muse. Hib., tab. 1, fig. a, is supposed by Mitten to be the gym- 
nostomous state of P. lanceolata. Dr. Taylor mentions in El. 
Hib. a form which is found near Cove, Cork, with capsules 
quite cylindrical. 
7. P. crinita {y^\lmv^. Bryol. Europ., vol. ii. Suppl. 1, tab. 123, 
Bryol. Brit., p. 95, tab. 41. C. Miill. Synops. 2, Suppl., p. 
622. DeNotr., Briol. Ital.,p 586. Rabenhor., Bryothec. Europ., 
ISTo. 805. 
Hab. Banks facing the sea at Howth, where it was first collected by 
D. Orr. Carrigloe and rocks west of Cork Harbour, Isaac 
Carroll. The specimens so named by Mr. AYilson diff'er only 
slightly in areolation from those named by same author, B. 
"Wilsoni. The long piliferous pointed leaves and smooth calyptra 
appear to be the principal marks of distinction between them. 
28. Ancectangifm. Br. et Schimp. 
Calyptra small cucuilate. Emit pleurocarpous ; vaginula perfect, 
cylindrical. Capsule pedicellate, erect or partially inclined, 
ovate or obovate, slightly inflated at the neck. Peristome none, 
annulus narrow, falling away in pieces ; lid slender, rostrate. 
Leaves linear-lanceolate, or subulate ; areolation small and round 
in upper part of leaf, basal cellules larger, elongated, and diapha- 
nous. Inflorescence dioicous. — The pleurocarpous fruit and per- 
fectly formed perichsetum render this genus somewhat para- 
doxical as to the position it should take in artificial arrangements 
or even natural arrangements. Eminent aiithors have held difi'e- 
rent views concerning it. In placing it here, Mr. Mitten is 
followed. 
