Cope. ] 1 70 
[Oct. 20, 
These display the elongate character seen in JZ. laevis, etc., but the ar- 
ticular surfaces are transversely oval, thus resembling the ZL. tctericus. 
They are less depressed thanin L,. perlatusand L. dyspelor. ‘The cup and 
ball of the penultimate cervical rise a little more transverse than 
those of the fourth dorsal. The last cervical is strongly keeled on the 
middle line below, and witha short obtuse hypopophysis marking the be- 
ginning of the posterior third of the length ; the median line of the first q 
dorsal has an obtuse ridge. There is no keel on the fourth dorsal. The 
diapophyses on the last two cervical and three first dorsal vertebra have 
great vertical extent ; the articular surface for the rib is not bent at right 
angles on the last cervical. Neural arches and spines are well preserved 
in most of the specimens. There is no trace of zygantrum. The neural 
spines are flat, and have considerable antero-posterior extent on cervica. 
as well as dorsal vertebree, and are truncate above. The first dorsal has 
a long strong rib. 
‘l'ransverse diameter cup penultimate cervical vertebra 
Nema Miamapter jot, SAMO 6 UL aeteas. Osi sieic pili! Sin ces ood cles O41 
Co er 072 
Verticalidiameter, balls ...5.+-.00.... ite dD oytel Mig iin ane sa 0455 
Transverse DO 64 edi lark wants Wane a usehbiedt) Ade oe 0555 at 
Elevation front margin neural spine penultimate cervical........ -088 Hi? 
Antero-posterior diameter do do CO} sévecuihe ye 05 
There are smooth bands around the balls and the surfaces of the cen- 
tra are striate to these. 
The depressed cups of the cervicals and anterior dorsals distinguish 
this species from the Z. validus, L. proriger and L. mudgti. The same 
elements are much larger and more elongate than in ZL. detertous. 
Lropon, sp. near éetericus, Cope. 
Represented in Prof, Mudge’s collection by portions of cranium inclu- 
ding jaws and quadrate bones, ete., with cervical and dorsal vertebiz. 
CLIDASTES VYMANU, Marsh, probably. 
/LIDASTES CINERIARUM, Cope. Dorsal and cervical vertebra. 
SAURODONTID A. 
IcurHyopEcrns, nr. ctenodon, Cope. 
ANOGMIUS CONTRACTUS, gen. et sp. nov. ? Saurodontidarum. 
Represented by a large series of vertebrae and portions of fins of an in- \ 
dividual of perhaps four feet in length. The characters of the vertebrae 
are those of Ichthyodectes in part, i. e. they lack the lateral grooves, but 
they resemble those of Saurocephalus in having the basal elements of the 
neural and haemal elements inserted by gomphosis and not codssified 
with the centrum. Specifically, the centra are relatively longer than in / 
I. ctenodon, and more as in the shorter forms of Saurocephalus, as 8. 
prognathus, which species the present one approaches in size. 
SAUROCEPHALUS, nr. prognathus, Cope. 
