oe 
EASTMAN: CARBONIFEROUS SHARKS. 67 
injured considerably by weathering and other destructive agencies. In 
all, portions of about 20 fused teeth are preserved, but only four of this 
number still remain in their entirety or nearly so. These occur near 
the distal end, and have been utilized for the construction of the adjoin- 
ing text-figures nos. 3 and 4, which may be instructively compared with 
Karpinsky’s text-figures nos. 23-34, or with Dr. Henry Woodward’s 
illustrations of C. davisiz. The teeth are much laterally compressed, 
closely apposed, and their lower portions are curved forward in such 
manner as to override one an- 
other. The latter character 
is more pronounced than in 
Campodus, less so than in 
Edestus and other species of 
Campyloprion. That the an- 
gulation or curvature of the 
teeth is toward the front in- 
stead of posteriorly, is demon- 
strated from the arrangement 
known to obtain in Campodus 
and Helicoprion. A forward 
inflection is attributable to 
Campyloprion davisit and C. 
lecontet, where the smallest 
teeth of the series are un- 
questionably the oldest ; and Campyloprion annectans Kastm. Lateral aspect 
it is unlikely that the seg- of four of the anterior symphysial teeth, 
their serrated apices partly restored. X 2. 
Fie. 38. 
ments of C. annectans were 
reflected in the contrary direction. 
The whole of the lateral surface of the crown appears to have been 
covered with enamel, but this has been removed in most places subse- 
quent to fossilization. In like manner the curiously curved patches of 
dentine occurring along the sides of the principal series toward the base 
have been largely denuded of their enamelled coating. Some of the 
symphysial teeth are worn, especially toward the proximal (posterior) end, 
but hardly to such an extent as to suggest attrition against mutually 
interlocking series of the opposite jaw. The coronal outlines are every- 
where smooth and regular, except along the apical margin, which appears 
to have been coarsely serrated. This serration is best indicated on the 
opposite side of the series from that shown in the photograph, and is 
represented somewhat diagrammatically in text-figure 3. Making due 
