328 MEMOIRS OF THE CARNEGIE MUSEUM 
The anterior part of the splenial has been fully described in a previous paper. 
The oval foramen present in the jaws of No. 603 (/oc. cit., p. 96) is also present near 
the symphysis in this individual. (See for., Fig. 1.) The suture between the 
surangular and angular on the external posterior end of the ramus now appears 
to be accurately determined, as following nearly the course provisionally indicated 
in the first restoration of the skull and jaws. (See Plate XXXVI.) 
Fig. 2 shows how the angular laps over and along the surangular, although the 
two elements were probably more closely applied than is shown by the cross-section. 
The articular appears very similar to those described previously, though perhaps 
more robust and occupying a more nearly horizontal position in the ramus. 
The rami are very slender for their length and height. 
MEASUREMENTS. 
No. 1441. Greatest length of coronoid, about ................ceececeeceeeeeee ees 220 mm. 
«1441. ““ width ‘ se Ot Fg Bbacdeooossobuasbod npodnEcGbqG50000 45 “ 
«1441. os ss ‘¢ posterior end of ramus ...........-....2.00002e0 ee TD) = 
“1441. te e OS meray — 80 Ge = G0 coooscdoocadosoocosnd000H ig} 
THYROHYAL. 
This specimen, as in No. 878 in the collections of the museum, has the right 
thyrohyal preserved quite intact. It was retained in the matrix parallel to the 
inner posterior part of the ramus of that side. ‘lhe anterior extremity while some- 
what expanded is more circular in cross-section than was indicated by the element 
mentioned above. ‘There is evidence of the opposite element in a fragmentary 
posterior end found in the matrix along the other ramus. Otherwise the shape 
and proportions are very similar to the thyrohyal of No. 878 described and figured 
previously. 
SCLEROTIC PLATES. 
Although crushing has badly distorted the sclerotic rings of both orbits there 
appears to be essentially the same number of plates (14) as observed in other mem- 
bers of this genus. The distortion mentioned above has so displaced the plates that 
the manner in which they overlap one another is clearly 
"ete EE shown. (See Fig. 3.) 
east bra Fe The plates lap over one another from left to right, the bey- 
sclerotic plates of Baptanodon lled edge of one over-lapping the reverse bevel of the other. 
natans (No. 1441). Onehalf 
This long free union of the plates would allow the sclerotic 
natural size. 
ring to expand and contract considerably. One orbit shows the 
bony covering extending back 40 mm. from the periphery, and it appears quite 
probable that this covering extended to the very back of the eyeball as in some 
