402 Systematic Paleontology 



Cinulia naticoides (Gabb) Meek 



Actaonia naticoides Gabb, 1860, Jour. Acad. Nat. Sci., Phila., 2d ser., vol. 



iv, p. 299, pi. xlviii, fig. 2. 

 Cinulia ? naticoides Meek, 1864, Check List Inv. Fossils, N. A., Cret. and 



Jur., p. 16. 

 Cinulia t naticoides Conrad, 1868, Cook's Geol. of New Jersey, p. 728. 

 Acta'onina naticoides Conrad, 1868, Ibidem. 

 Cinulia (Oligoptycha) naticoides Whitfield, 1892, Mon. U. S. Geol. Survey, 



vol. xviii, p. 161, pi. xix, figs. 28-30. 

 Cinulia naticoides Johnson, 1905, Proc. Acad. Nat. Sci., Phila., p. 19. 

 Cinulia naticoides Weller, 1907, Geol. Survey of New Jersey, Pal., vol. iv, 



p. 811, pi. xcix, figs. 12, 13. 



Description. — " Shell globose ; whorls three or four ; spire very slightly 

 elevated ; surface marked by numerous revolving lines. Locality and posi- 

 tion: From the marl of New Jersey. There are two specimens in the 

 Academy's collection; one from Burlington County, New Jersey; the 

 locality of the other is not known. One specimen in my own collection is 

 from Mullica Hill."— Gabb, 1860. 



Type Locality. — Mullica Hill, New Jersey. 



Shell small, globose ; spire evolute, but very much depressed ; aperture 

 a little more than two-thirds the total altitude of the shell ; nuclear char- 

 acters lost; entire external surface sculptured with low, flattened fillets, 

 approximately twenty-five in number upon the ultima, uniform in size 

 and spacing, and separated by squarely channelled, sublinear sulci ; aper- 

 ture loop-shaped, angulated behind, narrow but well rounded in front ; 

 outer lip arcuate ; inner lip conforming to the outline of the body, bearing 

 near its anterior extremity a single oblique plication. 



The species is remarkable for its globose outline and uniform close-set 

 sculpture. 



Occurrence. — Matawan Formation - . Three-quarters of a mile below 

 Ulmstead Point, Anne Arundel County. Monmouth Formation. 

 Brightseat, Prince George's County. 



Collection. — Maryland Geological Survey. 



Outside Distribution. — Monmouth Formation. Navesink marl, New 

 Jersey. 



