398 0. GC Marsh on a new fossil Serpent from New Jersey. 
The neural canal is broader than high, and its floor depressed 
posteriorly, with indications of a slight medial epapophysis. The 
sides of the canal are marked by a sharp longitudinal ridge, 
which, in connection with the arched roof above, gives a trifoli- 
tively shallow, and has its greatest depth on the medial line. 
Its base extends downward and backward until directly over 
the superior margin of the ball, protecting also from above the 
neural canal posteriorly. The neural spine is much compressed, 
triangular in outline at its base, and does not extend to the an- 
terior margin of the zygosphene. The base of the neural arch is 
strengthened by a thick rounded ridge, which unites the zygap- 
oyphyses oneach side. It begins below the plane of the anterior 
gapophysis, and ascending slightly, joins the posterior zygapo- 
physis above the articular face. Remnants of two hypapophy- 
ses connected by a prominent ridge exist, and show that the an- — 
terior process was much the smaller, and its base somewhat sep- — 
arated from the margin of the cup. 
The principal dimensions of this vertebra, which is apparently _ 
3:— 
an anterior dorsal, are as follow 
Length of centrum from edge of cup to 
convexity of ball, 14-25 lines. 
_ Transverse diameter of cup, rio .* 
Vertical diameter of cup, ck ieee 
Distance from top of zygosphene to " 
lower margin of cup, 13°25. * 
Vertical diameter of ball, yan 
Width of neural canal in front, 375. * 
Height of neural canal in frou, .-.-.- 2°5 
The present species is quite distinct from Paleophis hadanus 
Jope, which somewhat resembles it in size. The original so 
men on which the latter species was founded is now 12 the Mu 
