Part II - State of New Jersey

168 CRETACEOUS FOSSILSHoploparia sp.Plate 82, Fignres 5, 6Description.-Palm short and thick, obovate in section, greatestheight in the distal quarter. Upper surface broadly ron~~ded from sideto side, oblique and moderately arched in profile; a rou; of three strongcurved spines on its outer side, a single spine on the inner side betweenspines 1 and 2 of the outer row. Inner surface and the lorrer half of theouter surface ornamented with large flattened dome-shaped tubercles;on the upper half of the outer surface the tubercles are much smallerand farther apart. Lower edge narrowly rounded and without spines.Fixed finger triquetrous in section, basal height about two-fifths thedistal height of the palm; occludent surface broadly arched transverselyand bearing large contiguous teeth, which are wider than long,near the interdigital sinus.Measurements of figured specinien : length of palm 50: distal height40, thickness 27, basal height of fixed finger 16 mm.Remarks.-Although the age of this species is not certainly knownit is here regarded as Late Cretaceous because of its similarity to II.georgeana Rathbun (1935, p. 25, pl. 9, figs. 9-12), from the Monmoutbbeds in Maryland, differing from the latter in the absence of spines onthe lower edge of the manus. The original Yale Peabody Museumlabel of the figured specimen reads: "Ii. Rancocas. Hornerstown, N. J.Old collection." The matrix is a light gray glauconitic clay which coulrlhave come either from the Navesink or the Hornerstorvn formation. Asecond large palm (YPM No. 442, old coll.), from Hornerstown, inmatrix similar to the preceding, belongs to this species.Distribution in New Jersey.-Formation unknown: Ilornerstown,and Cream Ridge Marl Company's ditch (type locality); Ilornerstown.Pigwed specimen.-YPM 17905.Genus Oncopareia Rosquet, 1854Oncopareia sp.Plate 80, Figures 11-14Description.-Dactylus smooth, slightly arcuate, shallowly concavebehind the last (proximal) oceludent tooth; elongate-ovate in sectionanterior to the concavity and about twice as high as the thickness;triangular in section behind the concavity, where it flairs vertically andhorizontally, and has the lower half of t.he lateral surfaces excavatedbefore the proximal margin. A row of punctures on each side of thesharp subcarinate upper edge, the punctures on the inner side nearerto the crest, closer together, and extending farther postad than thoseon the outer side. The longitudinal median row of punctures on theinner surface of the dactylns does not reach the concavity behind theNEW JERSEY GEOLOGICAL SURVEY