1877.] 55 [Cope. 
bone to the other, and still more, from one extremity to the other. The 
crowns are swollen at the nearly sessile base, and contract rapidly to a con- 
ical and unsymmetrical apex. Those of the smaller teeth are more coni- 
cal, those of the larger more bulbiform. One side of the latter is slightly 
concave below the apex. The surface is shiny and distinctly grooved. 
Fractured crowns do not display any central cavity. There are sixty-five 
teeth on the plate. 
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iWadthton-short) border... «..is.e.. Soptete teeetosets Seton cre 8 S007 
Transverse width........ Sie ahshelay ores sie dahl ststelocra cater UOT 
WS ipilte seein. sient heared cee eee se daelasvl seve sate 5002 
OTHER TEETH. 
Teeth of four other species have been found by Doctor Winslow, to 
which I allude only briefly, as their characters are not sufficient to enable 
me to distinguish them from those of known genera and species. 
Species one. Thisis represented by a fragment of mandibular ramus, 
which supports six teeth, all of which have a greater or less part of their 
apices broken away. They stand in close juxtaposition, and are of equal 
sizes. The basal half or more of the crown displays the character of deep 
inflections or grooves. These teeth belong to some sauroid fish, or to a 
batrachian. 
Specie two. . This is also represented by a portion of mandibular ramus 
which supports four teeth. The anterior of these is larger, and is separ- 
ated from the others by an edentulous space. Their crowns are rather 
elongate and are compressed, having cutting edges fore and aft. Both 
edges contract to the apex, but the anterior the most so. There are a few 
shallow grooves at the base, but they appear to be superficial only. These 
teeth might belong to either a reptile or a batrachian, and it is useless to 
attempt to distinguish them by a name from the many genera of both 
classes that resemble them. 
Species three. Twostout, slightly flattened, conic teeth without cutting 
edges, represent this species., They are anchylosed to a very thin plate 
of bone, a part of which adheres to each. The base is oblique, expanding 
more in one direction than another. The greater part of the crown is 
marked by closely placed parallel grooves, which are much more numer- 
ous than in the species No. 1. They are larger than these or No. 2, 
measuring .004 in diameter at the base. They may belong to any one of 
a number of known genera of Batrachia, or Sauroid fishes. 
Species No. 4. These are more numerously represented than the others, 
occurring in Mr. Gurley’s collection as well as in Dr. Winslow’s first 
collection. There is nothing to prevent their reference to the Lacertilia, 
and I have thought that there is some probability of there being referable 
to the Clepsydrops collettii. They are not rooted, but are anchylosed in a 
shallow concavity of the jaw bone, which is only distinguished from that 
for the adjacent tooth by the corresponding scolloping of the lower margin 
