49 
Genus non det. 
PL VI, Pigs, n, 12. 
The imperfect anterior portion of a small elongated fish is shown of 
the natural size in PL VI, Pig. 11, and a few of the scales are enlarged five 
times in PL VI, Pig. 12. The specimen, however, is too imperfect 
for generic determination, and it is only noticed to point out the possibility 
that it may indicate the occurrence in the Ilawkeshury beds of the genus 
Ptycholepis, Agassiz. The gape of the mouth is evidently wide ; the suspen- 
sorium is slightly ohlicpie ; and the body is covered with small, narrow scales, 
difficult to interpret in the impression, hut prohal)ly somewhat as represented 
in the enlarged figure. A few rays of the pectoral fin are preserved, while 
the pelvic fin consists of very delicate rays, and seems to have an extended 
base-line. If the fossil does not represent an ally of Ftycholepis, it probably 
pertains to some fish of the type of Dictyopyye. 
