Affinities of the Palaeozoic Seeds of the Cono stoma Group. 23 
these two specimens, but we cannot speak critically as the preparation has 
not passed through our hands. 
It still remains to be shown that warrant exists for the assumption that 
the wall of the plinth underwent a long-continued or intercalary extension 
which would provide the necessary machinery for ‘ uncorking ’ the basal 
orifice of the lagenostome, and thus letting the pollen through. We have 
already had occasion to comment on the structure of specimen R. 114 
(p. 12); which has all the appearance of being a young seed. It was shown 
that in this case the plinth had only reached one-half the normal height, so 
that evidently the main extension of this organ must have been effected at 
a late period in development. 
Again, in the related seed Lagenostoma Lomaxii , the plinth was the last 
part of the seed to develop, as we know from the fact that it had not yet 
appeared in the small-sized seeds, although the pollen-chamber was already 
of full size and properly developed (cf. Text-fig. 12, p. 39). 1 
The pollen is not sufficiently well preserved to justify detailed descrip- 
tion ; suffice it to say that it was multicellular, ellipsoidal in form, and 
measured 75 yu, x 65 yot. 
III. CONOSTOMA ANGLO-GERMANICUM, sp. nov. 
i. Enumeration of Specimens. 
In the spring of 1904 an isolated section passing obliquely through an 
eight-ribbed seed was obtained from the Shore locality. This specimen re- 
mained of doubtful affinity until 1909, when Dr. Kidston put at our disposal 
a series of four transverse sections from a coal-ball obtained many years be- 
fore at Langendreer in Westphalia. These emphasized the previous sus- 
picions that the seed was nearly allied to Conostoma oblongum. The close 
relationship was put beyond doubt when, owing to the generosity of 
Dr. Jongmans, who placed his slides and uncut coal-balls at our disposal, 
details of the internal structure were obtained. 
Owing to the general character of its external form and the almost 
identical internal structure, we have no hesitation in provisionally referring 
this seed to the genus Conostoma ; 2 altogether some twenty sections of this 
fructification are now available, of which the greater number are from the 
German material of Dr. Jongmans. Having regard to this double source 
of origin of our sections we propose the specific name of anglo-germanictim . 
Up to the present time four sections of this seed have occurred from 
English material, of which one is the oblique section already referred to and the 
other three are more or less imperfect transverse sections, though of value 
as supplying our only information as to the histological structure of the testa. 
In the following list the sections are enumerated, with their source of 
1 Oliver and Scott : loc. cit., p. 212, and PL IV, Fig. 1. 2 See footnote, p. 38. 
