130 FRANZ STEPHANI AND W. W. WATTS. 
Plagiochila Rossii St., n.sp. 
Sterilis mediocris rigida, virens, corticola, laxe intricata lateque 
expansa. Caulis ad 6 cm. longus, simplex vel parum longeque 
ramosus. Jolia caulina conferta, oblique patula, canaliculatim 
concava, decurvula, in plano late ovato-trigona (5 mm. longa, 
supra basin 3°5 mm. lata) margine suwpero e basi rotundata semi- 
rotunda stricto, irregulariter denticulato, margine infero stricto 
nudo, sub apice dense minuteque dentato, apice angustissima, 
0:75 mm. lata, tridentata. Cellulae superae 27/27 trigonis magnis 
acutis, basales 27/36y, trigonis magnis nodulosis. 
Hab. Australia, N.S. Wales (The Jungle, Blackheath): Watts, 
1035. 
Plagiochila santoensis St., n.sp. 
Sterilis minor gracilis rigidula, flavo-rufescens, corticola, dense 
depresso-caespitans lateque expansa. Cawlis ad 35 mm. longus, 
simplex, rarius ramulo auctus, capillaceusfuscus. Jolia caulina 
oblique patula, remotiuscula, leviter concava, in plano anguste 
oblonga (2°17 mm. longa, medio 0°67 mm. lata) inferne nuda, 
superne utrinque spinulosa, spinulis plus minus validis, irregu- 
lariter distributis, in margine supero magnis numerosis, apice 
emarginato-bifida, laciniis porrectis, angustis, 0:4 mm. longis 
cuspidatis, parallelis. Cellulae superae 27/36, trigonis parvis, 
basales 18/36 trigonis subnullis. 
Hab. Novae Hebridae (Santo): Bowie leg. (Watts, 16.) 
Plagiochila serrifolia St., n.sp. 
Sterilis parva flaccida, tenerrima, pallide virens, terricola, dense 
depresso-caespitans. Caulis ad 2 cm. longus, simplex, rarius ramulo 
auctus. /olia caulina contigua, subrecte patula, parum concava, 
in plano optime rhombea (1°75 mm. longa, 1:25 mm. lata) margine 
supero substricto, inferne nudo, superne remote denticulato, mar- 
gine infero, illo parallelo, stricto, nudo, apice oblique truncata, 
basi optime parallela, similiter dentata. Cellulae superae 36/36p, 
basales 27/45 trigonis nullis, cuticula basalis striolata, superne 
nuda. 
Hab. Australia, New South Wales (Wyong): Watts, 1100. 
