302 REPORTS ON THE STATE OF SCIENCE. 
the pes, is suggestive of different functions for the pes and manus, or at 
any rate in the part taken by each in locomotion and support of the 
body. 
‘A the prints are well covered with tubercles. On the pes they vary 
from 1:5 mm. to 2 mm. in diameter, and those on the manus something 
less than 1 mm. Where the feet have sunk deeply into the mud we have 
indications of the tubercles, not only on the soles, but on the sides of the 
toes. 
These prints are found on about half a dozen of the slabs raised, and 
in every case they correspond in form and size, which suggests the possi- 
bility of their having been made by one individual. 
There are also two pairs of prints on a slab in the Liverpool Museum 
obtained many years ago (locality uncertain), and in the Warrington 
Museum there is a similar slab (from Storeton), with again two pairs of 
prints. However, in this case the print of the pes is about an inch longer 
than those of the present find. The Warrington slab certainly cannot have 
been acquired since 1874, and probably dates back to before 1856. As 
at either of those dates the workings were carried on at a considerable 
distance from the present ones, this, together with the slight difference 
in size, will warrant our treating the difference from A 1 as specific, and 
not merely as the result of some individual deformity. 
No other Cheirotheroid forms have been observed, but a great variety 
of forms of prints that must be included under A 1 has been presented. 
A notable instance is shown on a large slab acquired by the Owens College 
Museum, Manchester, which has a series of four pairs of a large-sized print 
of A 1, the length of the pes being nearly 10 inches, and the digits remark- 
ably stout and fleshy. On the same slab are two prints of a pes of very 
slightly smaller size, but much more slender proportions. The information 
at present available is, however, insufficient to determine whether these 
differences are due to age or individual peculiarities, or specific difference 
in the animals. The differences are very striking, and cannot be ignored, 
whatever their cause may have been. 
Rhynchosauroid forms.— Although a number of these forms are present 
on these slabs, there is still a difficulty in differentiating the fore and bind 
feet, so few can be traced in regular series. In one large form of D 1, 
about 4 cm. long, it was possible to measure the length of stride. The 
distance between two prints on the same side was 26 cm., and between 
the lines of right and left tracks apparently 7 cm. 
On a slab, probably from the lowest of the three beds now in the 
Museum of the Liverpool University, there is a short series and a number 
of detached prints of a small Rhynchosauroid form, which 
we shall distinguish as D 7. It is only an inch in length : 
the V. digit is very much shorter than IT., III, and IV. 
and points somewhat backwards, 7.e., it makes an angle 
greater than 90° with the axis of the foot. The other 
digits are generally widely spread, but sometimes IT./IV. 
Left Pes or lie close together and quite parallel; IV. is the largest, 
Manus. D 7.3. J, is short and divergent, but not to the extentof V. Each 
seems to be terminated by a sharp nail ; the digits are usually straight, 
but are at other times decidedly curved. 
The length of stride between two prints on same side is 13 cm. ; 
distance between lines of right and left tracks 7 cm. The track was very 
