TWEOCO (^ 17. 7 ee ee re ES ho en ee NE M eT 
230 DR. D. H. SCOTT: 
In C. Beinertiana the pith is large and contains sclerotic nests. The 
xylem-strands are similar to those of the preceding species, except that in 
the lower part of their course they become actually endarch. Division of 
the protoxylem has not been observed. The wood has a Cordaitean character. 
A synopsis of the five species is given on p. 221. 
The affinities of the species are then considered, with reference to 
Dr. Zalessky's proposed separation of C. fascicularis and C. Beinertiana under 
the generic name Hristophyton ; the conclusion is reached that, while generic 
separation may ultimately be justified, all the five species form a natural 
series, in which €. Saturni occupies, in certain respects, an intermediate 
position, between C. annularis and C. americana on the one hand, and 
C. fascicularis and C. Beinertiana on the other. 
Lastly, the affinities of the genus are discussed. While the whole 
Calamopitys series should remain in Cycadofilices, the nearest affinity being 
with the Lyginopteridez, through //eterangium, the species C. fascicularis 
and C. Beinertiana show some advance towards the structure of Cordaitales 
and especially of the family Cordaitec. 
LITERATURE CITED. 
Krpston & GwvyNNE-VavGHaw, 1912.—R. Kidston & D. T. Gwynne-Vaughan : On the 
Carboniferous Flora of Berwickshire—Part I. Stenomyelon tuedianum, Kidston. Trans. 
Roy. Soc. Edinburgh, vol. xlviii. Part ii. p. 263. 
Masten, 1911.— A. J. Maslen: The Structure of Mesoxylon Sutcliffi. Ann. of Bot. 
vol. xxv. p. 381. 
Scorr, 1899.—D. H, Scott: On the Primary Wood of certain Araucarioxylons. Ann. of 
Bot. vol. xiii. p. 615. 
Scorr, 1902.—D. H. Scott: On the Primary Structure of certain Palæozoic Stems with the 
Daudoxylon type of Wood. Trans. Roy. Soc. Edinburgh, vol. xl. Part. ii, p. 331. 
Scorr, 19012.—D. H. Scott: The Structure of Mesoxylon Lomaaii and M. poroxyloides. 
Ann, of Bot. vol. xxvi. p. 1011. 
Scorr, 1917.—D. H. Scott: The Heterangiums of the British Coal Measures. Journal 
Linn. Soc. London, Botany, vol. xliv. p. 59. 
Scorr, 1918.—D. H. Scott: The Structure of Mesoxylon multirame. Ann. of Bot. 
vol. xxxii. p. 437. 
Scorr & Jrrrrey, 1914.—D. H. Scott & E. Jeffrey: On Fossil Plants, showing 
cum. from the Base of the Waverley dd of iiti Phil. Trans. Roy. Soc. 
B. vol. 205, p. 315. ; 
Scorr & Paid 1910.—D. H. Scott & A. J. Maslen: On Mesoxylon, anew Genus of 
Cordaitales—Preliminary Note. Aun. of Bot. vol. xxiv. p. 236. 
SEWARD, 1917.— A. C. Seward : Fossil Plants, vol. iii. Cambridge. 
SoLms-LAUBACH, 1896.—H. Graf zu Solms-Laubach : Ueber die in den Kalksteinen des 
Kulm von Glützisch-Falkenberg in Schlesien enthaltenen structur-bietenden Pflanzen- 
reste. IL Abhandlung. Botanische Zeitung, Band li. p. 197: 
Sorms-LauBacu, 1898.—H. Graf zu Solms-Laubach: Ueber die seinerzeit von Unger 
beschriebenen struetur-bietenden Pflanzenreste des Unter-culm von Saalfeld in 
Thüringen. Abhandl.d. K. Preussischen Geologischen Landesanstalt, Neue Folge, Part 93. 
SorMs-LavBacH, 1910.—H. Graf zu Solms-Laubach : Ueber die in den Kalketeinen í des Kulm, 
atc: . IV; Völkelia refracta, Stelovylon Ludwigii. Zeitschrift für Botanik, 2 Jahrgang, 
p. 529 
