Part II - State of New Jersey

central apex which is elevated above the margin equal to about onet.l~ii-dthe lengtll of the shell; sides and anterior end of the shell slightlyconcave het\veen the apex and margin, and slightly convex along theposterior side. Surface marlred by elevated, rounded, radiating costae,which are rather wider than the interspaces and gradually increasingin size toward the margin of the shell, but are constantly increased innumber, both by bifurcation and by implantation. The radii are crossetlby very fine concentric lines, hut toward the margin of the sl~ell theseincrease in strength so as to become distinct crenulations on tl~e top ofthe radii, and are nearly or tluitc one-half as stror~g as the radii thf:mselves."(Whitfield.)Remarks.-Thetype specimen is unicluc.Iiai~~c in Xelu .Jevse!/-RlERCEANTVlLLE : 16NAVESINIC : Arneytown,, I upc.-Arncytown, S. J. ASS1' 19445.Emarginula ladowae EichmanElate 46, Figures 4, 6.E'~nurgii~u!a lfrdozune Eichman, 1955, A'\';~utiins, Val. 68, p. 113, pl. 4,figs. 7,s.This species ~vas recently described from the IVoodbury formationat IIa~ldonfield, S. J. (Locality 24a). It should be noted that the slagnificationof the original figures sl~ould be s 10 instead of s 5 as illdicntccl.Typc ASSL' 20:W.Petropoma ? raritanuin (Itichards) 1943Piate 4;1, Figure 1G; Plate 45, Figures 2-3Aaella?~a ? rarilalia, llichards, 1943, p. 28, pl. 5, fig. 16.Petroponia ? rariiaauni, Stephenson, 1954, p. 35, p1. 8, figs. 1, 2.Descriptiun.-"Ilescription based upon a rubher squcczc of the onlyknown specimen. Shell of medium size; whorls about threc, expandingrapidly. Body whorl rounded with relatively flat top. Ornamentciwith ten roxs of punctate ribs separated fro111 each other by groovesshowing faint traces of punctac. l'enultimatc ~rl~orl 1vit.11 four rihswith much less conspicuous 1)unctae; grooves between the ribsshowonly very faint traces of punctac. Apes not preserverl. Apertl~rc andcolumella not sho1r.n. Length 12.0 mm." (Richards)questionably refers it to PetraponlaNEW JERSEY GEOLOGICAL SURVEY