602 PROF. H. @. SEELEY ON THE DINOSAURIA OF 
of the centrum just behind the anterior articulation; the transverse 
width over the diapophyses appears to have been at least 13 inch. 
Behind the diapophyses the centrum is constricted regularly, so as 
to measure 1 inch from side to side. The sides and base are con- 
cave (Pl. XXXIV. fig. 1 a) from front to back; but the sides have a 
somewhat vertical aspect and the base a broad and flattened aspect, 
owing to these regions being separated by slight angles at the margin 
of the posterior articulation, though the base is moderately convex 
from side to side, and rounds into the superior lateral regions. The 
ovate posterior articulation has had its margin rubbed ; it is flattened, 
but moderately concave, much as in Teleosaurs, and is +4 inch deep 
and 13 broad, as preserved. The neural arch may have extended the 
whole length of the centrum; the neural canal is shallow, widened 
posteriorly, and contains small nutritive foramina in the middle. 
The second vertebra preserved (fig. 1, 2) has the base of the cen- 
trum more rounded, and consequently the diapophysis appears to be 
rather higher on the side of the centrum. The centrum is less con- 
stricted from side to side behind the diapophyses, the sides of the 
centrum are more convex in depth, the centrum is shorter, and 
the articular surfaces appear to be larger. The following are the 
measurements of the specimen as preserved :— 
Along the base of the centrum 1,3, inch, less along the neural 
canal; width over remains of diapophyses 12 inch; depth of ante- 
rior articular face 1 inch; width behind the diapophyses 1% inch ; 
width of posterior articulation 14 inch; depth of posterior articu- 
lation 14, inch. 
The external margins of the bases for the neural arch are com- 
pressed so as only to measure 13 inch from side to side. 
In the succeeding cervicals (fig. 1, 3, 4,5) the differences are slight, 
except from the increased depth of the centrum, which in the fifth 
measures 13 inch deep posteriorly, as preserved. The anterior 
articulation of the centrum is in all cases nearly flat; but the pos- 
terior face is moderately cupped, often with a central depression. 
The base of the neural canal, too, becomes more deeply channelled ; it 
is impressed in the middle with the nutritive foramina, and the 
tubercle for the rib rises higher on the side of the centrum. Since 
the first vertebra preserved is posterior to the axis, this animal must 
have possessed at least seven cervical vertebre; but there were 
probably not more than eight, since not more than one vertebra 
appears to be missing from between the last cervical and first dorsal 
of the series. 
Dorsal Vertebre (Pl. XXXIV. fig. 2).—There are thirteen dorsal 
vertebre, or vertebre from between the neck and the sacrum. They 
appear to be in sequence, and therefore, if the number were similar 
to that in the Crocodile, the gap between the dorsal and sacral series 
must be very small. In the Crocodile the series can readily be divided 
by the relations of the ribs into three groups, comprising, after the 
eight cervical, three pectoral, seven dorsal, and six postdorsal or 
lumbar. Nothing corresponding to this division can be recognized 
in the fossil, because only the centrums of the vertebree are preserved. 
