Fic. 
oom we 
12-14. 
15. 
270 
PAL AcE, Xo 
BOTHRIOLEPIS LEIDYI, Newb. (p. 111). 
- Pectoral spine and inside of left anterior ventral plate. 
. Narrow pectoral spine. 
. Head with dumb-bell aperture. 
- Dorsal scute. outside. 
. Dorsal scute, partially denuded, showing keel of under surface. 
BOTHRIOLEPIS MINOR, Newb. (p. 112). 
. Scutes, upper and lower surfaces. 
Chemung group, Leroy, Pa. 
HOLOPTYCHIUS GRANULATUS, Newb. (p. 100). 
. Scale, outside. 
HoLoptycuius Hauiu, Newb. (p. 114). 
. Scales, natural size and enlarged. 
HOLOPTYCHIUs FUSTULOSUS, Newb. (p. 100). 
. Scales, outside and inside. 
HOLOPTYCHIUS RaDIATUS, Newb. (p. 115). 
Scales, natural size. 
Catskill group, Blossburgh, Pa. 
SPHENOPHORUS LILLEYI, Newb. (p. 92). 
Clavicle?. 
Chemung group, Bradford County, Pa. 
