60 Messrs. Hancock & Atthey on a new Labyrinthodont 
are seen at either side doubled inwards and pressed down; 
they seem to have been short, probably not much over six 
tenths of an inch in length. That of the right side is nearly 
entire, and lies with its outer surface exposed, which is covered 
with a minute reticulation of raised lines. The posterior ex- 
tremity is considerably produced beyond the teeth, and is 
pointed and conical. ‘This process is apparently for cartilagi- 
nous attachment. The alveolar border is straight and thick, 
and contains seven teeth, three or four of which are perfect ; 
they are close-set, stout, and slightly incurved, with the tips 
rather abruptly pointed, a little compressed in the direction 
of the length of the jaw, and finely and sharply striated, the 
strim being raised; the base and middle portion are smooth 
and cylindrical. A mere trace of the left praemaxilla is visible; 
but four or five of its teeth are pressed down upon the vomer. 
These teeth are well preserved, and have all the characters of 
those of the right side. 
e vomer is largely developed, and extends backward 
quite half the length of the skull; it is divided by a suture on 
the longitudinal middle line, and the two lateral portions 
diverge a little behind. To these diverging points the ptery- 
goids are attached; they are wide, stout bones, which, passing 
outward and backward, abut at the posterior portion of the 
malars or the bones forming the hinder lateral margins of the 
Skull. In front of the pterygoids there is a large depression 
on each side, which may be the palato-temporal foramen: 
these depressions are circular in front; but their inner posterior 
boundaries are formed by the almost straight line of the ptery- 
goids. 
: On the middle longitudinal line behind the pterygoids there 
is an elevated process, which probably indicates the presence 
of the sphenoid; and behind this, on either hand, at the pos- 
terior margin of the skull, which is bounded by a strong ridge, 
there is a rounded elevation. "These two elevations are proba- 
bly the occipital condyles, pressed inwards; or it may be that 
they are the lateral margins of the sphenoid turned upwards 
and distorted 
they are short, stout, pointed, conieal, and have the RE 
striated, This great patch of minute teeth is bounded on 
