598 DR. NEWELL ARBER AND MR. F. W. LAWFIELD ON THE 
Srur, D. (1887) Die Carbon-Flora der Schatzlarer Schichten. II. Die Calamarien 
der Carbon-Flora der Schatzlarer Schichten. Abhandl. k.-k. 
Geol. Reichsanstalt, Wien, vol. xi. Part 2. 1887. 
Warws, C. E. (1876) Beiträge zur fossilen Flora. Steinkohlen-Calamarien, mit beson- 
derer Berücksichtigung ihrer Fruetification. Parts I and II. 
Abhandl. Geol. Specialkarte v. Preussen u. d. Thüring. 
Staaten. Vol. ii. Part 1, 1876. Vol. v. Part 2, 1884. 
Weiss, C. E. (1885) Ueber einige Pflanzenreste aus der Rubengrube bei Neurode in 
Nieder-Schlesien. Jahrb. K.-Preuss. Geol. Landesanstalt für 
1884, p. 1. 1885. 
ZEILLER, R. See RENAULT & ZEILLER. 
EXPLANATION OF THE PLATES. 
"(Some of the photographs require examination by means of a hand-lens. All the 
negatives were taken by Mr. W. Tams of Cambridge except Pl. 23. figs. 1 & 2, which are 
by Dr. Arber, and PI. 25. fig. 23 by Dr. Kidston. All the specimens figured except Pl. 25. 
fig. 23 are in the Carboniferous Plant collections, Sedgwick Museum, Cambridge, to which 
the numbers refer.) ; 
PLATE 23. 
Fig. 1. Calamophloios britannicus, Weiss. Showing the horizontal and vertical series of 
cracks or furrows in the smooth bark, and also root sears. 
From the Middle Coal Measures of Barnsley, Yorks. No. 410. Slightly 
reduced. (x 4.) 
Fig. 2. Calamophloios congenius, Arber. Showing the ridged regions of the internodes 
subtending the nodes and separated by areas with smooth bark. Many branch 
scars are also seen. 
From the Upper Coal Measures, Lower Conygre Pit, Tinsbury, Somerset. 
No. 1363. Slightly reduced. (x $.) 
Fig. 9. Calamophloios rugosus, Arber. Showing the ornamentation of an internode and 
an indistinct branch scar. 
Transition Coal Measures, Red Clay Series, Granville Clay Pit, Old Hill, 
South Staffordshire. No. 3322. (Natural size.) 
Fig. 4. Calamophloios undulatus ?, Arber. Showing the transverse wrinkling of the 
internodes, the leaf scars and two branch scars, 
Middle Coal Measures, Bonds Main Colliery, Temple Normanton, Du 
No. 4011. (Natural size.) 
Fig. 5. CalamopAloios majus, Arber. A reduced photograph of a large specimen with 
several internodes, which are longitudinally ridged. A number of branch scars 
are seen on the second node above the base of the specimen. 
Middle Coal Measures, Mattice Hill Boring, at 1680 ft., Kent. No. 2338. (x 3.) 
Fig. 6. Calumophloios rugosus, Arber. Part of an internode showing the rugose orna- 
mentation. 
Middle Coal Measures, Clay Cross, Derbyshire, No. 3398. (Natural size.) 
Fig. 7. Calamophloios majus, Arber. Enlarged view of internodes to show the ribbing: 
Branch scars are faintly seen at the summit of the specimen. 
Middle Coal Measures, Ripple Boring, at 2666 ft., Kent, No. 2290. (x 3.) 
