Part II - State of New Jersey

ornamentation as well as of other characters." Collignon (1948, MadagascarService Mines Ann., fasc. 13, p. 64) describes the genus as includingammonites with ribs often slightly flesuous, with numerousintercalated ribs that increase the number of the external tubercles,mith comprcsseil form and small umbilicus, and with gradual loss ofornament. The adults preserve only the umbilical and ventrolateraltubercles and the ribs are weak.Submortonicems vanuxemi (Morton)Plate 72, Figures 4, 5Amnaonites vanuzenli Alorton, 1830, Am. Jour. Sci., 1st ser., vol. 18,p. 244, p1. 3, figs. 4-5.Ammonites vanuzen~i Alorton. Morton, 1830, Acad. Nat. Sci. Phila.Jour., 1st ser., vol. 6, p. 194.Ammonites vanztzemi Morton. Morton, 1834, Synopsis, p. 37, pl. 2, figs.3-4.Ammonites vanzizemi Morton. Gabb, 1861, Synopsis, p. 71 (15).Ammonites vannzenai Morton. Whitfield, 1892, p. 252, pl. 42, figs. 1-5.Ammonites vanzizemi Morton. Johnson, 1905, Acad. Nat. Sci. Phila.Proc., vol. 57, p. 27.Mortoniceras delawarensis (Morton) (part). Weller, 1907, p. 837, p1.104, figs. 4-5 (not pl. 103; p1.104, figs. 1-3).IClortoniceras delawarense (Morton) (part). Grabau and Shimer, 1910,Index Fossils, vol. 2, p. 226, fig. 1507 (lateral view) (not fig. 1507,~entral vielv, nor fig. 1508).An~monites (Mortoniceras) z~anuzemi Morton. Miller, 1911, MarylandGeol. Surrey, Prince Georges County Itept., pl. 5, fig. 1.filortoniceras delawarensis (Morton) (part). Gardner, 1916, p. 391.Mortoniceras vanzczenli (Morton). Spath, 1921, South African Mus.Ann., vol. 12, pt. 7, p. 308.Sahmortoniceras vanzizemi (Morton). Collignon, 1948, MadagascarService Mincs Ann., fasc. 14, pp. 30, 43.The writer has available only Morton's type specimen, which hasa maximum diameter of 36 mm. At the end the \vhorl is 17 mm. highand 13 mm. wide. A little more than half a whorl is preserved, and itshows 9 umbilical tubercles and 18 ventrolateral tubercles, with 3 morerows of tubercles on the fianks. Whitfield figures a second specimenabout 55 mm. in diameter, on which, the ribs to about 40 mm. diametershow 5 rows of tubercles, and the latter part appears to have nearlylost the 3 rows on the flanks. From Whitfield's figure the dimensions ofthe whorl appear to be close to those of Morton's type.Remarks.-The name uanuzemi has been applied by Spath in Zululand,and Collignon accepts the record. It mould seem more likely,NEW JERSEY GEOLOGICAL SURVEY