94 FOSSIL ESTHERI.E. 



" Crustacea at Phoenixville and Gwynnedd. 



" Esiheria ovata {Posidonia ovata, Lea) and Estheria parva (Posidonia parva, Lea), in black 

 bituminous shales, Phcenixville (also at Gwynnedd). 



" Cypris, two species, one smooth, the other beautifully granulate,^ in black shales, Phoenixville, Rogers; 

 also at Gwynnedd, J. Leidy ('Proc. Acad. Nat. Sci. Phil.,' June 16th, 18.57). 



" Limulus{1). Fragjtnent of shield, probably Limulus ; black bituminous shales, Phoenixville. Other 

 remains, probably Crustacean, have been found in black shales, Phoenixville. 



" Mollusc from Phoenixville. 



"Myacites Pennsylvanicus, Conrad ('Proc. Acad. Nat. Sci. Phil.,' 1857, p. 166; and 1860, pi. 1, 

 fig. 3). In the black shales, with J5«<Am«. 



"Fishes at Gwynnedd and Phoenixville. 



" Single ganoid scale, in black bituminous shales, at Gwynnedd, Isaac Lea, this Journ. [2], vol. xxii, 

 123, 1856, more like Pygopterus mandibularis, Ag., than any other which had come under Mr. Lea's notice. 



" Scales, bones, and teeth of ganoid fishes are abundant in black bituminous shales at Phoenixville. 

 Scales have been found by Dr. Leidy and I. Lea also at Gwynnedd (« Proc. Acad. Nat. Sci. Phil.,' 

 June 9th, 1857). 



" Turseodus acutus, Leidy (' Proc. Acad. Nat. Sc. Phil.,' June, 1857, p. 167). ' This genus and species 

 are founded upon a left dental bone, with teeth, probably of a ganoid Fish, which I obtained from the black 

 shales of what have been usually considered the Triassic rocks, from near Phoenixville, Chester Co., Pa.' 



'' Radiolepis speciosus,^mmou&. YaxaWy Coelacanthi. Scale discovered at Gwynnedd by Isaac Lea, in 

 black bituminous shales (' Proc. Acad. Nat. Sci. Phil.,' June 7th, 1857), also at Phoenixville. 



" Catopterus gracilis, Redfield. Scales, bones, and teeth, similar to those from Richmond, Va., and 

 North CaroHna, are found in bituminous shales at Phoenixville. 



, " Reptiles at Phoenixville, ^c. 



" Clepsysaurus Pennsylvanicus, Lea ('Journ. Acad. Nat. Sci. Phil.,' new series, vol. ii, 1853, p. 185), 

 founded on vertebrae, ribs, and teeth, discovered in calcareous conglomerate. Upper Milford Township, 

 Lehigh County. Teeth, supposed to belong to this Reptile have been discovered by Dr. Leidy in black 

 bituminous shales at Phoenixville (* Proc. Acad. Nat. Sci., Philad.,' 1859, p. 110). 



" Eurydorus serridens (' Proc. Acad. Nat. Sci., Phil.' 1859, p. 110), founded on teeth, * large size, 

 compressed, conical, opposite acute serrulated borders,' discovered by Prof. Leidy in black bituminous 

 shales, Phoenixville. 



Composaurus ? Leidy ('Proc. Acad. Nat. Sci. Phil.' 1859, p. 110), founded on teeth discovered 



by Prof. J. Leidy in black bituminous shales at Phoenixville ; — ' borders without serrulations, base 



fluted; resembles the teeth of Composaurus of the coal of Chatham Co., North Carolina, but 



nevertheless belongs to a different species.' 



" Centemodon sulcatus,hesL ('Proc. Acad. Nat. Sci. Phil.,' vol. viii, p. 77, March, 1856), founded on a 

 single tooth discovered by Mr. Lea in black bituminous shales at Phoenixville, described in this Journal [2], 

 vol. xxii, p. 123. Bones and teeth, probably Batrachian, found by Dr. Leidy at Gwynnedd ('Proc. Acad. 

 Nat. Sci. Phil.,' June 16th, 1857), in black bituminous shales ; also at Phoenixville. 



1 See also W. B. Rogers's remarks on these Cypridce ('Proceed. Boston Soc. Nat. Hist.,' vol. v, 

 p. 15, 1854). 



