32 
APPENDIX. 
South Carolina. The present specimens are unworn, and display the 
characters ot the species. These are very much like those of the recent 
D. filamentosus. The species appears also to pertain to the horizon of 
the Miocene. 
PORTHEUS ANGULATUS. Cope. 
The crown ot the tooth which indicates this species is slender, com- 
pressed and curved backwards and a little inwards. The circumference is 
divided by two edges, the anterior acute, the posterior obtuse ; the con- 
vex faces separated by these are not equal, that towards which the crown 
is curved laterally, i. e. the inner, being somewhat more extensive, and 
considerably more convex. 
Enamel smooth, without sculpture. Cutting edge without curvations. 
more curved backwards than the posterior, which has but little curvature- 
inward curvature slight. 
Lines. 
Diameter (antero-posterior) at middle crown, 5 
Diameter (transverse) at middle crown, 4 
Diameter (transverse) near tip, 3 
Diameter (antero-posterior) near tip, 2 
Discovered by Prof. W. C. Kerr, State Geologist of North Carolina, in 
the Miocene marl, Duplin county, N. C., with Polygonodon rectus, and 
Ischyrhiza antiqua. Leidy. 
Icshyriiiza antiqua, Leidy, Proceed. Acad. Nat. Sci. Phila, 1856, 256. 
Emmons’ N. C. Geol. Survey, 1856, tigs. 47, 4S. 
The Miocene ot Sampson, Duplin and other counties. 
The teeth of this genus bear a very close resemblance to those of the 
genus Esox, at present existing in the fresh waters of the northern 
hemisphere. 
BATKACI1IA. 
Pakiostegus Myops. Cope. Trans. Am. Philos. Soc. 1869, p. 10. 
Trias, of Chatham Co. 
Dictyocephalus elegans. Leidy, Proc. Ac. Nat. Sci. Phil. 1856, 256. 
Emmons’ N. C. Geol. Survey, 1856. N. Amer. Geology, 59, tig. 31, 32* 
Trias, ot Chatham Co. 
