56 ME, E. W. HOOLEY ON THE SXTJLL AND [Peb. I907, 



The maxillo-palatine suture leaves the palatine suture at 

 right angles, and at a distance of 30 millimetres from it turns 

 sharply, keeping a straight line parallel with the latter, until near 

 the palatal vacuity, where it doubles back at an acute angle, and 

 immediately enters the vacuity. 



The premaxillo-maxillary suture is hidden by the sym- 

 physial extremity of the mandibles. 



The mandibles (PI. IV, fig. 1, c) are long and slender. They 

 have no vacuity. The incisary region is well raised, and sinks 

 rapidly to the laniary. There is no, or only a slight, elevation in 

 the median region of the alveolar tract ; they rise without further 

 undulation to their articular end. The alveolar tract extends 

 probably some 288 millimetres (11-33 inches). 



The symphysis is short. The mandibles at this end are heavy 

 and broad, their outer margins being very square. At almost 

 regular intervals up either side of the symphysis are a series of pits 

 in line, and deeper than any in the immediate area. 



The splenials (PL III, i) enter well into the symphysis. 



There are only two teeth preserved, both in the hinder region 

 of the maxillae, one in the right, the other in the left. They are both 

 small. They have the characteristic ridges and well-developed 

 carinae, laterally, midway between the concave and convex sides. 

 As the mandibles are firmly fixed against the upper jaw, and the line 

 of junction is filled in by matrix and pyrites, the dental formulae 

 cannot be ascertained. 



The alveoli that are visible prove the teeth to have been very 

 unequal in size, and the upper overbit those of the lower jaw. 



The atlas and axis vertebrae (PI. II, o &_p) are cemented by 

 the matrix and pyrites to the occipital region of the skull, above 

 the condyle. The neural arch of the atlas and the distal ends of 

 the floating ribs are preserved, but they cannot be fully exposed 

 without damage. 



The odontoid bone is united to the centrum of the axis. Com- 

 pared with the latter, it is large. Its anterior articular surface is 

 slightly convex. At this end it has a strong broad ridge, laterally 

 and ventrally. The centrum of the axis is small. The neural spine 

 of the axis is missing. Both the atlas and the axis vary little 

 from those of recent crocodiles. 



Pour more or less perfect cervical ribs are also embedded here. 



The third cervical vertebra (PI. IV, fig. 2, 6) is lying in the 

 matrix in the pelvic region. The fourth, fifth, sixth, and portion 

 of the seventh cervicals (PI. IV, fig. 1, d-g), and the proximal 

 ends of their ribs, are contained in a small block of rock, showing a 

 recent fracture posteriorly. 



The next block has a similar face anteriorly. The portion that 

 filled the gap has not been recovered. On this block, and on three 

 others all exactly fitting on to each other, are a part of the sixth, 

 the seventh, eighth, ninth, tenth, and eleventh dorsal 1 (PI. IV, 



1 The number of cervical and dorsal vertebrae is here taken to be equal to 

 the number of the corresponding vertebrae in Goniopholis simus. 



