94 FOSSIL ESTHER17E. 



" Crustacea at Phoenixville and Givynnedd. 



" Estheria 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, 1 in black shales, Phcenixville, Rogers; 

 also at Gwynnedd, J. Leidy (' Proc. Acad. Nat. Sci. Phil.,' June 16th, 1857). 



" Limulus (?) . Fragment of shield, probably Limulus ; black bituminous shales, Phcenixville. Other 

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



" Mollusc from Phoenixville. 



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

 fig. 3). Iu the black shales, with Estherice. 



" 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 mandilularis, 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 Phcenixville. 

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

 June 9th, 1857). 



" Turseodus acufus, Leidy (' Proc. Acad. Nat. Sc. Phil.,' Jane, 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 Phcenixville, Chester Co., Pa.' 



" Radiolepis speciosus, Emmons. Family Ccclacanthi. Scale discovered at Gwynnedd by Isaac Lea, iu 

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



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

 North Carolina, are found in bituminous shales at Phcenixville. 



" Reptiles at Phcenixville, §-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 Phcenixville (' 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, Phcenixville. 



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



by Prof. J. Leidy in black bituminous shales at Phcenixville ; — ' 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.' 



" CentemodoH sulcatus, Lea ('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 Phcenixville, 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 Phcenixville. 



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

 p. 15, 1854). 



