Pole. 730 



c, outer inrolled edge; d, profile lengthwise of front side edge. 

 Chester, 111., Chester limestone (under Conglomerate). Distinct 

 from all other known species, and a unique specimen from 

 above the Chester fish bed which hand yielded most fish remains. 

 It is the largest known species of this kind of fish. — XI, 



Polemarehus gigas, E. Hitchcock, Ichthyology of Mass. 

 1858, p. 107, 181, pi. 18, fig. 1, outline natural size {reduced 

 here to one-half) of the high foot of a supposed crocodilian (?) 

 reptile ; pi. 59, fig. 3 {one-fourth natural size). An impression 

 in the Connecticut river red shale formation at Chicopee falls, 

 Mass., in the bed of the river; found also at Cabotville, Mass. 

 No fore-foot print found ; no web between the toes as in the 

 shorter toed crocodiles ; but a ten foot long crocodile has a foot 

 scarcely ten inches long, and it might be i hat this lizard was 

 fifteen feet long, with a foot fifteen inches long. Found by C. 

 H, Hitchcock (see MS. letter, Dec. 18, 1888) at the quarry at 

 Milford, N. J., on the Delaware (ten miles below Durham creek 

 in Bucks Co., Pa., and three miles from the mountain; there- 

 fore in the upper beds of the Irias, {Rhmtic. Fontaine.) 



Poliochera punctulata. Scudder. A spider from Mazon 

 Cr., 111., in Lacoe's collection at Pittston, Pa. Proc. Am. Acad. 

 Vol. 20, p. 16. Goal measures J, ^XIIL 



Polyernus laminarum, Scudder. Memoirs of the Boston 

 Xl, _..<^:^^^^^^^^^^''^^=«*^^v. Society of Natural History, 



^ ^ '^^<^^^^^^^^^^^ 1885, plate 31, fig. 1, found 



>^. in the black shale base of 



b^ Campbell's ledge Conglom 



erate, in the gap of the Sus- 



j quehanna North Branch 



'■^y above Pittston, Luzerne Co- 



Scud • I &W ; W . jT""' " "^^^^ Pa. Lacoe's collection. XI L 



Polyernus complanatus, Scudder. A flying insect from 

 a Mazon Cr. nodule, 111. Mem. Bost. S. N. H. Vol. 3, 1885, p. 

 343, pi. 32, fias. 8, 11. In Lacoe's collection at Pittston, Pa. 

 Coal measures. XIII. 



Polygnathus coronatus, crassus, cristatus, curvatus, dubius, 

 duplicatus, eriensis, immersus, linguiformis, nasutus, palmatus, 

 pennatus, princeps, punctatus, radiatus, serratus, simplex, 

 solidus, truncatus, and tuberculosus, are twenty species of 



