RQ 
1872.) 353 
the teeth differs much from that seen in the species just described. 
They have an oval section at base, but speedily become much compressed 
in a direction oblique to the long diameter of the bone, and develop cut- 
ting edges opposite to each other, and separating equal faces. The crown 
is a little more conyex on one edge than on the other, and has a slight in- 
ward curvature. The apex is sharp. The cementum of the crown is 
smooth, but the surface of the basal portion below the commencement of 
the cutting edges is minutely striate-grooved, some grooves being deeper 
than others, the surface having a silky lustre. 
The surface of the bone where preserved is without special sculpture. 
The upper margin is grooved for articulation with a supernumerary 
maxillary. 
M. 
"eet in Wa. Oi, UWO.sc. sss cess MER ae lea es pests 
Length of last maxillary tooth.......... etree any . 0,008 
WWONS CiaMeter OF DASIS OL” oli ye oes ec es Peres be 3004 
Depth maxillary bone at “ ...... Eee Ole ever es ye 3 ULE 
The premaxillary bone belonged probably to a smaller fish. It has the 
characters seen in Hnchodus but is shorter and deeper than in the known 
species. The lateral groove is here subvyertical and on the anterior face 
extending to near the basis of the tooth. The inferior face behind the 
tooth expands gradually to its base, which is marked by the narrow cres- 
centic scar of the older tooth seen in H. pressidens, The crown of the 
tooth was searcely as large as that of the maxillaries, but is lost. Its 
basis is fluted, and the surface finely striate. Length of bone, M. .015. 
This specimen was not found with the preceding. The latter was dis- 
covered on the same bluff that produced the C. seméanceps and the Stra- 
todus apicalis, at some distance from them. 
CIMOLICHTHYS GLADIOLUS. Cope. sp. nov. 
Represented by a single elongate tooth which is intermediate in char- 
acter between those of the two species last described, but much larger 
than either. It is too large for an anterior maxillary tooth of C. anceps 
and should it pertain to the end of the mandibular series, will in so far 
resemble the genus Hnchodus. But the cutting edges are opposite to 
each other, and not, as is usual in that genus, on one side, leaving the 
inner face very convex. In this species the crown is rather slender and 
compressed above the base. The anterior cutting edge extends to the 
bottom, while the posterior reaches only half-way down ; there is no barb. 
The section of the base exhibits an angle in continuation of the latter. 
The inner face is a little more convex than the outer; its posterior half 
is rather coarsely striate keeled. The posterior half of the outer face is 
finely striate. The inner posterior aspect of the root presents a cavity of 
absorption for the successional tooth, as in C. anceps. The cutting edge 
and top of apex are glossy black. Length from fossa, M. .019 ; diameter 
at do., .006. 
From a locality at a short distance from that of 0. anceps. 
A. P. S.—VOL. XII.—2s 
[Cope. - 
