394 Proceedings of the Royal Irish Academy. 
40. Physcomitrella. ScMmp. 
Calyptra conico-campanulate, small, entire. Capsule spheroid, apicn- 
late at the apex ; columella persistent. Leaves few, placed toge- 
ther at the apex of the very short stem ; areolation loose, cellules 
somewhat hexagonal. Antheridia naked, axillary with para- 
physes distended at the apex. 
1. P. patens (Schimp.). Bryol. Europ., vol. i. Monogr., p. 1, 
tab. 3 Rabenhor., Bryothec. Europ., No. 161. Phascum 
patens, Hedw., St. Crypt, 1, tab. 10. Bryol. Brit, p. 34, 
tab. 5. 
Hab. On moist banks near Belfast. Yery rare in Ireland. 
41. Sph^rangixjm. Schimp. 
Stems very short, simple. Capsule spherical; peduncle very short, 
immersed among the leaves ; columella distinct. Antheridia 
without paraphyses, gemmiform. 
1. S. muticum (Schimp.). Synops. Muscor., p. 13. Phascum 
muticum, Schreb., de Phase, p. 8, tab. 1, f. 11, 12. Bryol. 
Brit, p. 29, tab. 5. 
Hab. On moist banks and where water has stood. Erequent about 
Dunkerron, Kerry, Taylor, in El. Hib. Damp sands at Mala- 
hide, but rare in Ireland. 
Sec. 2. Capsule without peristome. 
42. Physcomiteium. Bridel. 
Calyptra large campanulate-rostrate, lobed at the base. Capsule pe- 
dicellate, erect, obovate or pyriform, exannulate. Peristome 
wanting ; lid convex, with or without an apiculus. Leaves of 
thin texture ; areolation loose, composed of oblong thickish cel- 
lules ; nerve ceasing at or below the apex. Inflorescence monoi- 
C0U8 .or polygamous. 
Diagnosis of Species. 
Capsule pyriform ; calyptra inflated, split 
on one side ; leaves oblong-lanceolate, 
acute, thickened at margin, . . 1. P. eeicetoetjm. 
Capsule pyriform ; calyptra inflated below, 
split on one side ; leaves ovate-oblong 
acuminate, serrated, not thickened at 
margin, 2. P. fasciculake. 
