326 MEMOIRS OF THE CARNEGIE MUSEUM 
to make certain alterations and additions to the description and drawings then 
given, especially those relating to the elements of the skull and lower jaws. 
The parts of specimen No. 1441 recovered consist of a skull and lower jaws 
lacking a median section of the rostrum, the codssified atlas and axis, third and 
fourth cervicals, besides vertebree in various stages of preservation from other parts 
of the vertebral column. With the exception of the proximal end of one humerus, 
the ulna, and a few paddle bones, all other elements are missing. 
Tar SKULL. 
The cranium, although subjected to severe pressure, which has somewhat dis- 
torted the outlines of the skull, appears very similar to those previously described 
in the paper above mentioned, with the exception that it pertains to a somewhat 
smaller individual. 
The superior view shows the transverse displacement between the anterior end 
of the postfrontal and the posterior end of the nasal, and, as breaks occur in identi- 
cally the same place, and take the same transverse direction in two other crania 
(Nos. 603 and 878) in the collections of the Carnegie Museum, the writer now as- 
sumes this displacement as following the line of suture, and in the corrected draw- 
ing (See Plate XX XVII, Fig. 1), they are indicated as absolutely determined. The 
suture separating the premaxille at the anterior third of the rostrum is plainly 
shown in this specimen. Another point of interest is the wide prefrontal developed 
in this individual. 
Viewed laterally this skull sheds new light on the posterior termination of the 
premaxillary. In Baptanodon the posterior end of the premaxillary is somewhat 
forked as in many forms of the Ichthyosauria. The lower posterior branch extends 
back under the nares, laps over and hides from a lateral view most of the anterior 
prolongation of the maxillary. (See Plate XXXVI.) The longitudinal channel 
along the side of both the premaxillaries and dentaries, just above and below the 
dental grooves (See Fig. 3), has many more nerve pits for the entrance of nerves to 
the teeth than was indicated in the first restoration of the skull of Baptanodon. <A 
pineal foramen appears to be present and occupying essentially the same position as 
in the other skulls in this museum. The posterior part of the skull is so badly dis- 
arranged that nothing of importance is shown. 
The other views of the skull show nothing new, and, as the other elements have 
been fully described in a previous paper, it is unnecessary to repeat the description 
here. 
