252 Mr. E. A. Newell Arber. New Species of [Jan. 10, 
Coal. They were collected by Mr. A. Sinclair, of Kilmarnock, in 1889, who 
also obtained a further specimen in 1903. 
Mr. Kidston recorded these specimens as Lagenostoma sp., but he has 
since proposed in M.S., in honour of the collector, the specific name, 
L. Sinclairi, which I have pleasure in adopting here. 
(2) Morphology of the Seed and “ Cupule.” 
As will be seen from the drawings on Plate 2, figs. 7 to 11, the specia. 
interest of these specimens lies in the fact that many of the seeds are still 
enclosed in their protective envelopes, which are regarded as similar, morpho- 
logically, to the organ recently described as the “cupule” of Z. Zomaxi.* 
The presence of a “cupule” naturally renders an exact description of the 
seed itself a somewhat difficult matter, but in some instances the “ cupule ” 
has apparently perished, and the seed is thus disclosed. We may first 
consider what can be made out with regard to the morphology of the seed. 
The seeds appear to be somewhat smaller than in the case of LZ. Kidstone. 
They vary from 4 to 55 mm. in length, and at their widest part from 
15 to 3 mm. in breadth. In shape they are elliptical-oblong. They are 
undoubtedly radially symmetrical (Plate 2, fig. 9). The integument is 
apparently smooth, and slightly ridged longitudinally. There do not appear 
to be any lobes at the apex as in LZ. Kidston, but the apex is slightly 
notched or fluted (Plate 2, fig. 9), recalling in this respect Z. Lomaa. It 
is impossible in these specimens to determine the number of the longi- 
tudinal ridges, or of the flutings at the apex, but the apical characters, in 
conjunction with the general morphology of the seed, and the presence of a. 
“cupule,” leave little doubt that they may be correctly assigned to the genus 
Lagenostoma. 
The “cupule,” which encloses many of the seeds, varies from 8 to 9°5 mm. 
in length. The average breadth of the seed including the “cupule” is. 
about 3 mm. at its widest part. The “cupules” appear to be attached to. 
the axis slightly below the seed. They are sac-like organs, prominently 
ridged longitudinally, and entire for a distance of 5 mm. or more from the 
base (Plate 2, figs. 8 and 11). At the apex they are divided into a number 
of lanceolate lobes, 1°5 to 25 mm. in length, or, perhaps, even longer 
(Plate 2, fig. 8). The preservation of the specimens is not, however, very 
good in this region, and the details cannot be made out with accuracy. In 
the clearest examples the “cupule” appears to enclose the seed somewhat: 
loosely, and the lobes at the apex are erect and not spreading. 
It is impossible to obtain any evidence as to whether the seeds in these 
* Oliver and Scott, zbid., p. 215. 
