Moore. — On the Mosses of Ireland. 
347 
7. Ceratodon. Bridel. 
Capsule pedicellate, cylindrical, cernuous, with a short swollen or 
substrumose neck, annulate. Peristome single of 16 teeth, cloven 
nearly to the base, in two segments, connected below by trans- 
verse prominent articulations. Leaves lanceolate- subulate with 
dense roundish small areolation ; the basal cells larger and 
diaphanous. Inflorescence dioicous. 
This genus is placed among the Trichostomacese, by Lindberg, in 
his revision of that tribe. 
Diagnosis of Species. 
Capsule elliptic or sub cylindrical, furrowed 
when dry, strumose at the base, . . 1. C. puepuertjs. 
Capsule cylindrical, sub-erect, or slightly 
curved, . 2. C. cylin^drtcus. 
1. C. purpureus (Bridel.). Bryol. Univ. 1, p. 480. Didymodon purpu- 
reum, Muscol. Brit., Ed. 2, p. 113. Bryol. Brit., p. 84, tab. 20. 
Hab. On dry banks, sand hills near the coast, and especially on 
heaths which have been recently burned. Yery common every- 
where through Ireland. 
2. C. cylindricus. (Br. et Schimp.). Bryol. Europ., vol. ir., tab. 192. 
Bryol. Brit., p. 85, tab. 39. Trichostomum cylindricum, 
Hedw. tab. 24. Didymodon cylindricum. Hook, in English Elora, 
vol. V. 
Hab. On sandy banks near the Botanic Gardens, Belfast. T. Drum- 
mond. N^ot hitherto observed elsewhere in Ireland. 
8. Bhabdoweissia. Br. et Schimp. 
Capsule pedicellate, short, oval, 8-striated; lid rostrate. Peristome 
single of 16 lanceolate teeth, without medial line. Leaves linear- 
lanceolate, margins plane and nearly entire ; areolation dense and 
somewhat quadrate. Inflorescence monoicous. 
Diagnosis of Species. 
Teeth of peristome fugacious subulate, . . I.E. ffgax. 
Teeth of peristome more persistent, . . . 2. K. denticulata. 
1. a. fugax (Br. et Schimp.). Bryol. Europ., vol. i., tab. 41. Bryol. 
Brit., p. 50, tab. 15. Weissia striata var. minor. Hook, and 
Tayl. Muscol. Brit., Ed. 2, p. 81. Weissia fugax, Hedw. 
Hab. Crevices of rocks, &c. Glenmalur and Powerscourt Waterfall, 
Wicklow ; Connemara, Galway ; Sillagh-braes, near Larne, 
Antrim ; Benyevenagh, Derry. 
