254 
H. Hamshaw Thomas. 
On the axis between the leaf whorls there are a large number 
of minute black bodies, seen in transverse section in Fig. 3 and 
Text-fig. 32 C, where their shape is very irregular but flattened- 
They also occur on the base of the cone and on the fertile portion, 
as seen in Fig. 2 and Text-fig. 32 A and B, which show them in 
longitudinal view. In many cases the black portion has shrunk 
away from the wall and forms an irregular band in the centre. It 
has a very similar appearance to that characteristic of the 
Text-fig. 32. Hairs at the base of the cone. A, Group of hairs on axis 
near base of lowest sporangiophore. x 60. B, Hairs on lowersideof “annulus.” 
X60, C, Transverse section of group between leaf bases, x 120. 
“ melasmatic tissue.” These bodies appear to have been of the 
nature of small hairs, and from their dense contents may, perhaps, 
have been glandular. Their occurrence is of some interest, as 
hitherto hairs have never been noticed on any of the Catamites, and 
they are very rare on recent Equisetums, if indeed they occur at 
all. 
Leaves of the type described above have been also found in 
connection with young twigs, and it seems probable that before long 
they will be found attached to a well preserved stem. The question 
of the affinities and stem of Calamostachys binneyana will then be 
finally set at rest. 
Impressions of Calamostachys. In the Sedgwick Museum 
(Cambridge) there are several slabs of shale from Raven Shore, 
Lancashire, collected from the Brooksbottom seam by Mr. Aitken 1 . 
They show a large number of impressions of cones and small leafy 
shoots of Catamites , together with some larger stems. The cones 
correspond very closely with that just described, and probably 
belonged to the same species. A typical example is shown in Fig. 4. 
One of these specimens was figured by Binncy, ibid, p. 27, PI. VI., Fig. 1. 
i 
