Se et Pe 
Mineralogy and Geology. 421 
pec enn retytel Cig Yair n., M.C.; S. catenoides, 
<M. C.; S. striata, s. n., M. G.: ——, M. C. ok smh) erect stem, 
pony like S. Nanduns s. (Ciathraria) Menardi Brongt., U. C. and 
de S. (Asolanus) Sydnensis, s. n., M. C.; S. 0 rea anum L. & H,, M.C.; 
elongata Bron. ongt., M. C.; 8. flex nosed, é MM. , thy Cog 8: pachyderma 
led M. C.; aS. (Fav.) Prt ar $e ths M. C.; ; S. apes 8 Ney 
 §. Dournaisii Brongt., M. C.; §. Knorrii Brongt., 
‘SreincoanpRon, Brongt. ”_Obscure specimens, refer able to a narrow- 
ribbed species of this genus, occur in the Lower Carboniferous beds at 
Horton and Onslow. 
StigMARIA, Brongt. —Under this name I place all the roots of Stgilla- 
ri@ occurring in the Carboniferous rocks of Nova Scotia. They belong, 
without doubt, to the different species of sigillaroid trees, but it is at pres- 
ent impossible to determine to which ; and the s specific characters of the 
ria themselves are, as might be anticipated, evanescent and unsat- 
Calamites proper "The calamite-like cas ar or internal cavity, sur- 
rounded by a thick cylinder of wood pete consisting of scalariform 
Ils an oss Ste with one row o of roun es; external to this i is 
Minous ¢ coal, 
our —Calamodendron approximatum Brongt., M.C.; C. obscurum, 
M. ©. 
eel L. & H.—These elongate linear leaves have two or three 
ribs and the central band between the ribs raised above the margin; one 
species has been seen attached to Sigillaria Schotheimiana. 
The leaves of Siyillaria elegans are different, being as broad as the 
ie to suppose that they may have icagel to ‘Sigillaria or Calamoden- 
Stems of Sigillaria of the groups Rhytidolepis and Favularia 
bare rings of abnormal scars at intervals, which may have borne such 
of fruit, No such marks are seen on the stems of other subgenera 
. Sigillaria, which probably bore fruit at their summits. 
a tlhe rhabdocarpl, s. 1a M.C.; A. pygmea, 8. n., n., M. 
- Squamosa, s. ——-, ants C., indistinct, but ap- 
i different - those above dese ribed. 
es, Brongt.— Species. ~Trigonoearpum Hookeri Dawson 
9 Si ys - illarie, s. m., M. C.; T._ inter- 
“pity vol. este M. C.; a" eager ial te MG: 
1; UC: 
tras The Trigonocar abundant in some ads of the Middle coal 
on, wc ae tr fruits of Sigillaria, some of them perhaps of 
