Cope.] 518 [April 5, 
Measurements. ' M. 
Hlevation of base of neural spine. 2. she sles ee . .083 
Widthofapex ‘ “4 2p Meer coovdocuoodia.. WR 
Vertical extent of extremity of diapophysis........ qso0 HlBe 
: ANLELO-POSLETION <eilereteieieietetieiaae SO 
Diameter of centrum 
heseenit a SoC SACHOOR GS SE .027 
Width between inferior extremities of tubercular facets 
OldiapophiySessereiierrecsenieeeries Bersterareteuctaretaterate -. .066 
Width between extremities of zygapophyses....... oboe Alls 
Length ** e¢ fy a6 bonosnoosad clue 
No. 2, a larger individual. 
Total elevation ...... RUsocote sabato Amesee i) ajavaueictsiarste a cilsil) 
( antero-posterior..... eeemG a -- .029 
Diameter of centrum ~ tlanSvierserecec sleet scene el 043 
Erste) esac bss se Bageas QJEY) 
Extent of zygapophyses......... oie Ac SRboboo sdb OOo x 102 
Elevation of neural spine....... Meckeaitets iatioe lege tone ret stopete 026 
The portions of the vertebral columns referred to this species cannot be 
reconciled with those of any of the species of Hpicordylus or Clepsydrops. 
In both of these, large parts of the dorsal series are known, and even if those 
genera should possess dorsal vertebrae with hyposphen, which is very im- 
probable, the peculiar forms of the zygapophyses and neural spine will 
still distinguish them widely. 
EMBOLOPHORUS FRITILLUS. Gen. et sp. nov. 
This form reposes on some dorsal vertebree with intercentra and ribs in 
place, which display some interesting characters. The neural arch is co- 
éssified, and the zygapophyses and diapophyses are well developed ; the 
latter not elongate, and standing on the base of the neural arch. The cen- 
tra are notochordal. The intercentra are narrowed and transversely ex- 
tended. The ribs are two-headed ; the capitulum is received into a fossa 
of the posterior border of the intercentrum in advance of the vertebra 
which supports the diapophysis, to which the tuberculum is attached. 
The curious mode of articulation of the ribs I have not observed in the 
species of the genera heretofore described, unless the forms of some of the 
intercentra of the Clepsydrops limbatus indicate it. If so, that species must 
be removed to Hmbolophorus. 
Char. Specif. Centra with a circular section at all points, and contract- 
ed at the middle. No carinz or grooves. The intercentra project beyond 
the edges of the centra, giving the column the appearance of supporting 
annular ridges. Their lateral angles extend upwards nearly to the base 
of the neural arch. The diapophyses are short and are directed upwards 
and forwards ; their extremities are concave. The zygapophyses are large 
and their articular faces nearly horizontal. The size of this species is 
small, little exceeding that of the Bolosaurus striatus. 
