TKIASSIO KLOKA OK BALI) HII.L. 
surl.ace impression of the stem, as the flutings are not deeply im- 
pressed ; in (iy. 2 the starlike a,ppearanee in tlie middle of the fossil 
may indicate the erackim; of tlie eoitex by pressure taking place 
over a newly forming branch. 
Xodal Pia phrafinis.- That seen in fig. 5 is so like the form in 
IdfmseUtes that one might pause before referring it to Xchizouevra, 
of which there have apparently been as yet no records in the jiresent 
assemblage. Hnt the discovery of other Schizoueura stems with 
the nodal diaphi'agms more or less in position, makes their reference 
to this genus certain. In Hchizoneura the radii of the diaphragm 
are })erha,])s less numerous than in Equis^etites, but the central papilla 
is well developed as in that genus as would be ex])ected from their 
similarity iu geueral structure. 
l)i)Neituslor.,s- 
Diameter of widest stem, 7 '5 mm. 
Diametei' ol an average stem, circ, b mm. 
Longest stem-fragment preserved. 10 '5 cm. 
.Vn a-ciculate leaf measures 1!) mm. by 2 '5 mm. at the base. 
luternodes often seven times the width of the stem. 
Ohservatioiks.- The stems of the above s})ecies of Schizoneura, 
as they are |)reserved in the Jlacchus Marsh silic'eous mudstones, 
are conspicuously sti’aight, and distinctly and deeply grooved in 
the pithcasts, or with parallel sulcations wlien the surface impi'ession 
is represented. ’^Phe nodes are very distant and not always (‘learly 
visible. It was undoiditedly the character of the straight and 
conspicuously grooved stems with distant nodes that led McC'oy 
to place these plant remains, apparently without hesitation, in the 
genus Evlnzoncura , for the leal remains associated with these stems 
are veiy indistinct. It was only by caiefullv scanning everv piece 
of material with a. lens, that the fi'agmentarv evidence here hgured 
was obtained. 
.\s regards the narrow, straight, and deeplv grooved stems with 
mconspicuous leaf-sheaths, these structural '('llaracters find their 
ueaiest rehitionship with the smaller foliaiceous varieties of 
l>chizon>euT(t . like S. iiiendn-i Schimper, of the Keu])er of Stuttgart. 
Coni pa.n, sou, s.- Species like Sehizouevm (/oudirauousis, h’eist- 
mantel, S. aiostrahs Etheridge, jnr.^^ and S. afrimua, Eeistmantel, 
have the leal-sheath typically developed from a basal sheath into 
a^ pair of large ol)long-ovate leaves, with occasional sheaths with 
narrow leaflets. I hese leaflets may numbei', as in S. i/oitid ivdueusis, 
as many as ten. In the [)resent species one of the distinctive 
characters is the apparently uniform, aciculate. leaf-like whoil. the 
24 In passing it may 1 h* puintiul out 
{toiH supra cit.), regards 5. ati,stralis Eth. jnii. as 
tli.it \ewell Alber. in his Glossopteris Flora, pp. r> and 
a synonym of .S', ijondivanensis 
1 130 J 
