Part II - State of New Jersey

6 CRETACEOUS IQSSILSrounded subangular in the lower part and rather rapidly contractedbelow to the short columella; aperture ovate-elliptical, acute above androunded below; outer lip thin and sharp, inner lip smooth, without callusor ridges; surface polished, entirely destitute of lines or other markings.On one individual, on which the lip is broken away for one-thirdof the volution, there occurs a distinct spiral ridge above the columellaproper and just below the junction of the outer lip with the body of thcvolution, within the aperture." (\Vhitfield)The dimensions of one of the type specimens are: height, 5.6 mm.;greatest diameter, 1.6 mm. ; apical angle, IFo.Range in Xezu Jersey-WOODBURY: 24Type.-Haddonfield, N. J.; AXSP 15585Family Scalidae~cala sillmani (RIorton) 1.834Plate 50, Figure 3Scalaria sillntani, Morton, 1834, Synop. Org. Rem. Cret.. Gr. U. S., 1). 47,pL 13, fig. 9.Scalaria sillimani, Whitfield, 1892, p. 136,111. 18, fig. 2.Scala silln~ani, Weller, 1907, p. 672, pl. 76, figs. 2-3.Not Scala silljnani Wade 1926, p. lGB=Epitoni~lm pondi Stephenson.Description.-"Shell of medium size, measuring nearly one inch inlength and rapidly tapering, the apical angle being about 30" or 35';volutions five or more, very round and full, hut closely compacted; thcsuture line deep and sharp, but close; aperture (as shown on the onlyspecimen in hand, which is a matrix containing thc shell of one side ofthe specimen in place and from which a gutta-percha cast is taken fordescription and figure), is round, but the margin is not preserved;surface of the shell marked by oblique varices, which have a slightlybackward direction in crossing from the upper to the lower side ofthe volution; the Tarices are thin and recurved, ,and numher eighton one-half of the circumference of the last volution, but decreasesomewhat in number toward the apex of the spire; axis imperforate:the base of the last volution bordered by a raised carina, helolrwhich the varices do not appear to extend. So far as can he ascertainedfrom the specimen, I should judge that the varices were slightlyproduced in the upper part to form subspines around the base of tl~epreceding volntion. The minute surface character of the shcll ean notbe ascertained from the specimen in use, as only the inside of the substanceis revealed, but Dr. Morton describes it as marked by 'veryminute spiral striae,' ~vl~ich one ~vould suppose xrould naturally bc thecase. Mr. Gahh also speaks of it having 'much finer' revolving striaethan his Sca!a (Opalia) Thomasi, which is also a New Jersey species,NEW JERSEY GEOLOGICAL SURVEY