284 BERRY: FERN GENUS CLATHROPTERIS 
The venation of Clathropteris has always excited great interest. 
In the proximal region where the pinnae are fused it is somewhat 
irregularly anastomosing, as is admirably shown in Zeiller’s 
vi 
6 es ay of 
hs BONE by 
it Ai, of Vi Vat 
1 OM | hs ory AG 
Sy AG ft OP Me iia 
bids AD ki f A Lhd 
" L] i iy 
NS : ae Ne ie Ne ry We ded lig ee 
SH =i sant ea Es Hama Sta la ie a vee 
ANA \ he ai a a a a Wo Ma yp TS V2 
i ys ae he OG 
tata c I yA aa Ya CANIN ray HE 
ARON a oy A a aa RE ls sy 
AULA Re te EO CAM as Cine ey 
oe sy ee ae, ry Wi LE p 
QS aN ye Chee LGD pay CHE LZ tg ess 
WX A QE ‘ ann ae ee KEE LEG ie 
QS RY ey Be ay hi ie” Ss Le 
. Mt gst 3e U cf a 
SSN W ca 
SSS 5 LE BES 
x Ne 
KY 
ee = SS > 
ee ee = 
LES ae 
SSS 
eS 
Ye 
~ 
x 
xy 
AY 
Saree ere Se, 
—— 
H 
HH 4 
a I 
1) 
t / 
y | 
l 
Vi 
Sse 
SELES 
=— —— 
A =e 
Cg on ee _. 
Si ey LEE: LOY = SN 
4 7 Ly SN ? f => “SEES 
Lh? MGA JEE cS, SS 
ti P toe HU fe ea A ‘ 
j y ay BO 
Lip LS LR, Lee Lyf Gite SINS 
Lh GER We 
1G. hi so NS Swng 
iy ip by: wal a Wh 
aap yRiey PK SS 
Ny ye P oy a 
Y TK) LUT) 
yh i: x ay 
Ly 
hs 
4 
= 
oa 
=, 
4 
Fic. 2. Tentative 
restoration of Clathropteris platyphylla, one eighth natural 
restoration.* In the free portion of the pinnae is very stout 
midribs give off, at regular intervals and at very wide angles ap- 
* Zeiller, R. Eléments de Paléobotanique, 116, f. 89. 1900. 
