NU 
210 DR. D. H. SCOTT : 
I propose to begin with C. annularis, which stands most in need of further 
elucidation, though I may say at once that my observations in almost every 
respect confirm the brief account. given by Solms-Laubach, so far as it goes. 
CALAMOPITYS ANNULARIS (Unger), Solms. 
The available sections of this species are from three specimens (besides a 
doubtful one), two of which (Berlin, 97 & 98) are described by Solms- 
Laubach (1896, p. 75) as among the most indubitable examples *. 
Specimen 97 shows the general structure best. The two transverse 
sections are cut quite close together, and show no important change of 
structure. Section 97 appears to come just above 40a. 
The diameter of the stele, measured to the outside of the secondary 
wood, is about 20 mm.; that of the pith, including the primary wood, 
6-7 mm. The phloem is badly preserved, but a large piece of the cortex, : 
or leat-base, quite 1 em. thick, is attached. This shows the Kalymma 
structure, already described by Solms-Laubach (P1. 7, Phot. 11). 
The primary xylem appears to be continuous or nearly so. The preserva- 
tion is far from perfect, but the tracheides can generally be recognized by 
their thiekened and. pitted walls; the pith is almost every where surrounded 
by a band, several layers thick, of such elements; there may have been 
occasional small gaps filled by parenchyma. The primary xylem-strands 
are not very well defined ; judging from the frequency of protoxylem- 
like groups of small elements, they must have been very numerous— 
perhaps as many as 20 (see Phots. 12-14). As a rule, the strands are 
eccentrically mesarch, the protoxylem lying decidedly nearer the outer 
than the inner edge; in these cases there is usually a marked difference 
between the centripetal and centrifugal portion of the xylem, the former 
consisting of larger tracheides than the latter (see Phot. 13). In both 
* The sections examined are as follows :— 
1, Specimen, Berlin, 97, 
Two almost identical transverse sections, labelled: “97 Stigmaria annularis. Saalfeld. 
Richter. (Berl. Ldes. Anst. 97-1)." “40a. Stigm. annul. Culm Saalfeld. Coll. Solms 413." 
One radial section, labelled: “97R. Calamop. ann. Berlin Landesanst, Coll. Solms. n. 413.” 
2. Specimen, Berlin, 98. 
One transverse section only, labelled : “98 Stigmaria annularis. Saalfeld Richter, Berlin 
Landesanst. Coll. Solms, n. 411.” 
3. Specimen, Halle, 761. 
One transverse section, labelled; ** 761. Cal. annul, 9. Mus. Hal. Coll. Solms. n. 420.” 
4. Specimen, Berlin, 49. 
One radial section labelled: “49R. Stigm. ann. Culm Saalfeld. Berl. Ldesanst. Coll. 
Solus. n. 421." 
I am not sure that this isolated section is rightly named, and have taken no account of it 
in the text. 
