COMPARATIVE ANATOMY OF CYCADACEE. 
Eremogone subulata, Fenzl (capillaris). 
Euthalia rotundifolia, Rupr. (ro- 
tundifolia). 
yllifolia, Rupr. (serpyllifolia). 
Gouffeia arenarioides, Rob. & Cast. 
(massiliensis). 
crassiuscula, Cambess. (holosteoi- 
des). 
holosteoides, C. A. Mey. (holoste- 
oides). 
Gypsophila aggregata, Linn. (capi- 
tata) 
succulina, Calv. et Zohrab, 1867 
(blepharophylla), 403. 
Lepyrodiclis cerastioides, Kar. & Kir. 
(holosteoides var. cerastioides). 
holosteoides, Fenzl (holosteoides). 
paniculuta, Stapf (holosteoides var. 
paniculata, Williams). 
quadridentata, Maxim, (quadriden- 
tata, Williams). 
stellarioides, Fisch. & Mey. (holo- 
steoides var. stellarioides, 
Williams). 
tenera, Boiss. (tenera). 
Lobelia bryoides, Willd. herb. (dicra- 
noides). 
Micropetalum lanuginosum, Pers. 
(lanuginosa). 
437 
Mehringia nemorosa, Fenzl (lanugi- 
nosa). 
umbrosa, A. Gray (saxosa). 
Odontostemma glandulosum, Benth. 
(glandulosa, Williams). 
Pettera graminifolia, Reichb. (saxa- 
tilis). 
Plinthine aggregata, Reichb. (capitata). 
tetraquetra, Reichb. 
var. pyrenaica). 
(tetraquetra 
Spergula ciliaris, Brot. (conimbri- 
censis). 
Spergulastrum lanuginosum, Michx. 
(lanuginosa). 
Stellaria aculeata, Scop. (grandiflora). 
Arenaria, Linn. herb. (spathulata). 
elongata, Nutt. ((lanuginosa). 
Kingii, S. Wats. (congesta var. 
Kingii). 
lanuginosa, Torr. & Gray (lanugi- 
nosa). 
longepedunculata, Baldw. (lanugi- 
nosa). 
muralis, Link (capitata). 
pubescens, Willd. herb. (lanugi- 
nosa). 
saxatilis, Scop. (saxatilis). 
Saxifraga, Bertol. (Saxifraga). 
serpyllifolia, Scop. (serpyllifolia). 
The Comparative Anatomy of certai Genera of the Cycadaceæ *. 
By W. C. WoRnsDELL, F.L.S. 
(Prate 20.) 
[Read 3rd February, 1898.] 
INTRODUCTION. 
MATERIAL of various Cycadaceous plants having at different 
times within the past year or two been placed at my disposal, I 
made a careful investigation of the anatomical structure of the 
Plants concerned. The greater part of the material afforded 
little of a novel character, but one or two of the plants examined 
ethibited interesting and striking structures. 
It was considered 
Worth while to describe in a single paper each plant in succession 
Which I had investigated, although the structure of some of 
these differs little from what has already been described in other 
* From the Jodrell Laboratory, Royal Gardens, Kew. 
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