ARACHNIOPSIS. 395 
sub 12-seriatis conflati. Folia conferta ; crura subparallela, cellulis 
4 v. 5, triplo fere longioribus quam latis, conflata. Foliola ad cellulas 
2 minutas, transverse collaterales, redacta, radicellifera. Br. intime 
foliis triplo longiores 4-partitee. Per. lineari-fusiformia trigona, ore 
longe 12-ciliata. 
1, ARACHNIOPSIS PECTEN, Spruce (Tab. XITT.). 
Hab. Ad fluviorum Negro et Uaupeés cataractas, in terra rupibusque 
humidis umbrosis. Perichaetia perrara ad Catanacundnw tl. Guainia 
(i.e. fluviam Negro supra fl. Casiquiart ostia) inveni, perianthia 
autem nullibi. 
F -3—5™™ longa; c 2™™ longa; rami Q 1:2-2°0; br -8™™, 
Minuta ccerulescens depresso-ceespitosa. Caules }-1-pollicares filiformes 
ascendentes araneoso-intexti, parum radicelliferi, postice subramosi, 
ramique e cellulis 5-seriatis conflati; cellule se. corticales 4-seriate, 
quarum antice biseriate magne cylindric vacuse, posticee biseriate 
duplo minores; axiales autem solum uniseriate, anguste, sectione 
quadrate, chlorophyllose. 
Folia dimidio numero cellularum caulis faciei superioris, alterna, pectin- 
atim patula, parum assurgentia, wnicrura, setacea, stricta, cellulis 4 
vel 5, uniseriatis, cylindricis et 3-4plo longioribus quam latis, 
leevibus, parum chlorophyllosis, terminali parva, conflata. Foliola 
nulla. 
Flores dioici: 2 in ramo perbrevi, vel sublongiore, postico assurgente, 
terminales, innovatione nulla. Folia subfloralia (quando adsint) 
2-3-juga, szpe tristicha, uni-bicrura. Bracteze propriz capitato- 
congestee 3-4-juge, tristichee, patentes vel conniventes, foliis duplo 
longiores, exteriores liberee 4-partitee, limbo basali 3 cellulas lato, 
laciniis capillaceis, cellulis 6 vel 7 uniseriatis—aliarum ipsa basi 
biseriatis—conflatis ; bracteze 3 intimee basi inter se connate, altius 
integree, laciniis 4 vel pluribus. _Pistillidia sub 12, brevia. 
Obs. The cells of the stem are usually opposite (i.e., collateral) or nearly 
so, but towards the point of the branches the cortical cells of the upper 
face sometimes become alternate. The hair-like leaves spring from the 
junction of two consecutive eortical cells, and they stand (on each side of 
the stem) two—very rarely three—cells apart. In the structure of the 
stem and the position of the leaves there is great resemblance to Cephalozia 
monodactyla, but the other characters are widely different. 
2. ARACHNIOPSIS COACTILIS, Spruce (Tab. XITI.). 
Hab. Punuré fluvii Uawpés, in lignis putridis. S, Carlos del Rio Negro, 
supra vimina emortua. Etiam in Andibus Peruvianis, alt. 1200™ 
(var. captllacea). 
F 6-75; c 43 br ‘8; per 15-18 x °3, cilia 5; caps 5 x 95mm, 
Prostrata late effusa e viridi grisea, siccando albescens cinereave. Caules 
pollicares serpentini filiformes, cellularum 5-6 seriebus conflati, se. 
cellulis corticis 4-seriatis, axeos 1-2-seriatis et angustioribus ; 
perpaulo ramosi, ramis omnibus posticis. 
Folia plus minus dissita, angulo 50° patentia, cruribus 2, ab ipsa basi 
sejunctis, filiformibus flexuosis subdivergentibus constantia; cellula 
