124 University of California Publications in Botany [Vol. 6 



1. Fronds monoecious. 



X. Outer cortex 85-110^ thick 1. G. Scinaioides. 



XX. Outer cortex 50-70/^ thick 2. G. imdulata. 



XXX. Outer cortex 35-50^ thick 3. G. OTcamurai. 



xxxx. Outer cortex 22-40yii thiclv 4. G. Halliae. 



2. Fronds dioecious. 



X. Outer cortex GO-So^u, thick 5. G. capensis. 



XX. Outer cortex 40-60/^ thick 6. G. confusa. 



B. Gonimoblasts radiating, variously grouped, the central free, the lateral longer 

 and applied closely to the periderm Pseudoscinaia. 



1. Plant more robust, utricles 12-20^ (T) x 20-26^ (R) 1. P. Snyderae. 



2. Plant more slender, utricles 20-2V (T) x 13-21^ (R) 2. P. australis 



VII. DIAGNOSES OF NEW GENUS AND OF NEW SPECIES 



Scinaia Johnstoniae sp. nov. 



S. atropurpiirea, 8-12 cm. alta, 7-8-plo dichotoma, cylindrica, con- 

 tiniia, lata, 3-5 mm. diam. (sicca); ramis inferne attenuatis; axillis 

 angustis; axi ohsciiro (sicco) ; cystocarpiis minutis, sed visibilibus, 

 dispersis ; — filo axiali laxo latoqiie, filamentis paiicis majoribus et 

 gracilibus laxe intermixtis; epidermide cellnlis magnis, decoloratis (aut 

 "utriculis"), extus truncatis et cellulis coloratis paucis gracilibus dis- 

 persis et singulis aut tetraplo aggregatis intermixtis composite ; utriculis 

 extus truncatis, arete appressis, superficie 5-7-goniis, in magnitudine 

 prope uniformibus, quadratis aut leviter complanatis, parietibus tenu- 

 ibus ; cellulis epidermidis coloratis paucis, dispersis, 1-4-plo aggregatis ; 

 cellulis hypodermalibus in strato singulo laxoque positis, orbicularibus, 

 16-18/x, diam. ; strato cortieato tenui, laxi, filamentis tenuibus percur- 

 rentibus composito; monoica( !) ; antheridiis dispersis, 1-4-plo aut 

 leviter aggregatis ; cystocarpiis late pyriformibus, in collum angustum 

 abrupte contractis, 180-265^ (T) et 128-170/a (R) ; filamentis gonimo- 

 blasticis gracilibus, numerosissimus, e placenta parva, cellulari et breve 

 pedicellata radiantibus corpus sporogenum late reniforme efficientibus, 

 sporas ellipsoidales deinceps abscidentibus; peridermio tenui, prope 

 4 stratis cellularum pseudoparenchymaticarum composito ; in Cali- 

 fornia australi prope "San Pedro" a Domina H. D. Johnston et "La 

 Jolla" a Domina J\I. S. Snyder atque in California inferna prope 

 "La Paz" a Domino Vives detecta. 



Scinaia japonica sp. nov. 



S. atrorubra, 15 cm. alta, 9-11-plo dichotoma, raodice lata, 1-3 mm. 

 diam. (sicca), cartilaginea ; axillis angustis; substantia, ut videtur, 

 densa et earnoso-cartilaginea ; axi invisibili (sicco); cystocarpiis 

 obscuris (siccis) ; — filo axiali robusto, filamentis latis numerosis et 

 filamentis gracilibus paucis composito; epidermide cellulis magnis 



