IN THE LOWER CARBONIFEROUS SERIES OF SCOTLAND. 469 
require modification, and on the other some points are in need of 
enlargement. or instance, the posterior lateral angles are rounded 
(Plate XXIII. figs. 5 & 6), and not angular, as previously stated, 
although there are one or two individuals in which they so appear ; 
I have, however, satisfied myself that this appearance is super- 
induced, as the angularity must arise from pressure in some parti- 
cular direction. The figure of the type specimen * from Belhaven 
Bay showed the central ridge only, and a lateral one on each side 
of it, although when I came to examine it again, by the aid of the 
more recently discovered specimens, I found that there did exist the 
remains of an extension of the carapace on the left-hand side, be- 
yond the marginal line represented in the figure as the lateral 
border; this marginal line will therefore represent a second ridge 
which is seen between the secondary ridge and the lateral margins 
on the carapace of some of the present specimens, and which pro- 
bably represents the incurved border of the carapace showing through 
its structure. 
Nothing satisfactory in connexion with the antennee or antennules 
could be made out in the type specimen; this deficiency we are 
now able to supply. The form and position of these organs quite 
support Dr. H. Woodward’s view, that the organs in question did 
not differ essentially in position or form from those usually found in 
the Macrura. This opinion was expressed by Dr. H. Woodward in 
opposition to the views held by the late Mr. Salter, who believed 
the antennules to be long and simple, and placed within the bifid 
antenne 7. 
The peduncles of the antennze are not distinctly preserved; the 
flagella, however, are bent obliquely outwards, and are composed of 
small numerous joints; for their size they are tolerably broad at 
their bases and taper gradually. The peduncles of the antennules 
consist of three elongated joints directed forwards, and terminating 
in two tapering setiform flagella composed of numerous well-marked 
joints; they diverge nearly at right angles from one another. 
We still need accurate information about the rostrum of 
A. Woodwardi. Its position was tolerably well defined in the 
specimen from Belhaven Bay, now confirmed in one or two of the 
present specimens; but not in one can I definitely ascertain the 
presence of serrations along its course. 
The crushed condition of the present specimens would not lead us 
to expect any very marked trace of the eyes; but, notwithstanding 
this, it is just possible that a certain rounded outline on one side 
of one of the specimens (Pl. XXIII. fig. 5, a) may be one of the eyes, 
especially as there is a dim trace of faceting. I may state that 
Dr. Woodward is inclined to this view. 
Hitherto, so far as | know, no trace of eyes has been observed in 
Anthrapalemon. Messrs. Meek and Worthen imagined they had 
detected t them in one of their examples of A.? gracilis, M. & W., 
from Grundy County, Illinois; but more complete specimens $ 
* Loe. cit. t. 27.£.3 & 3a. + Trans. Geol. Soc. Glasgow, ii. p. 246. 
$ Llinois Geol, Survey Report, i. p. 407. § Llid. iii. p. 554. 
