Part II - State of New Jersey

82 CRE'P:\CEOIJS FOSSILSridges, while on the surfaces between the volntions of the casts verydistinct \,ertieal and spiral ridges appear. On oue of the larger individualsthe columellar lip appears to have been consitlerably thickened,and to have been but very faintly marked by a single fold, very obliquelyplaced; while on the upper portion of its surface the ridges ofthe preceding volution hare left l.11cir imprint, appearing as nearlyl~orizontal folds, though in reality being the effect of external markings.The single rery oblicjue fold is placed rery near the base of thecolumella, and on son~e specimens appears only as an angulation ofthe columella." (Jl'hitfield)Re~~~urks.-Thispecies is probably the largest gastropod in theCretaceous faunas of New Jersey. It resen~bles 1'. conratli. but it ismuch more ponderous than that species, with a less extended anteriorheak. The rolutions of tl~e spirt: are a!so prol)ortion;~lly much longerant1 less ventricose than in that spet:ies, ant1 none of the rolntions issl~o~~ldered at the top. (\\Teller)Ranye in New Jersey-MT. LAUREL-NAVESINIC: 41,43, 45, 58Volulornorpha delawarensis (Gabh) 1861Plate 60, Figure 4Vul?~ta dclazuure?~sis Gabb, 1861, Proc. Acad. Nat. Sci. Phil. (1861),p. 322.7'olzitn ? tlelawarcnsis IVhitfield, 1892, p. 84, p1. 10, figs. 5-7.l'olzifu~~~orpha delatunro~~sis Groot, Organist and ltich;~rds, 1954, 11.52, 111. 6, fig. 5.Description.-"Sl~ell abore a medium size, very rentricose and ponderousin character; height of sl~ell and transverse diameter nearlyequal, or higher than wide ; spire low conical, the entire shell consistingof about four volntions; those of the spire convex, and the last oneangnlated above and truncated below; round oentricose! or short pyriformon the inner half, but becoming more and more angulated, andson~ctimes quite angular above toward the aperture, with the snmmitslight,ly concave; colnn~ella t\visted, so far as can he ileterminerl fromthe casts esilmincd ; aperture large, snl~angular abore and lrroad below,with apparently a \vicle and deep anterior channel ; surface of the volntionsmarked by strong, distant, node-like elevations on the upper part,\vhich are esten(1ecl below in the form of irreg~llar rertic:al folds: visihleto near the base of the rolution." (Whitfield)Ra~~go oirtside A'ew Jersoy-Delaware.Type.-Delavare and Chesapeake Canal, Del. ; AXSP 14266.NEW JERSEY GEOLOGICAL SURVEY