100 PALEONTOLOGY OF KEW JERSEY. 



Formation and hcalihj: In friable green marls of the Lower Marl Beds, 

 at Holmdel, New Jersey. Collection at Rutgers College. 



Genus CITHARA Sclium, 



CiTHARA MULLICAENSIS, n. Sp. 



Plate XIII, Figs. 2-6. 



Shell moderately large and robust for its length, with a short, obtusely 

 pointed spire and very large body whorl, which constitutes nearly the 

 entire bulk of the shell; the spire, measuring from the swell of the body 

 volution when looking upon the front of the shell, foi-ming about two-fifths 

 of the entire height; volutions four and a half to five in number, short, 

 indistinctly marked and the sutures obscure ; the body whorl somewhat 

 produced below, forming a short canal; aperture large, elliptical, pointed 

 above and notched below; and about equaling one-half the length of the 

 shell; surface of the shell marked with strong, longitudinal ribs, which are 

 quite distant and number onl}- about ten on the body whorl ; the ribs are 

 strong, sharply elevated, with concave interspaces, and with fine longitu- 

 dinal lines of growth marking the surfaces; and the whole crossed by ele- 

 vated thread-like raised lines, distant and distinct, but most plainly marked 

 on the ridges; on the internal casts, the most usual condition, the spire 

 is more elevated and the form less robust, with more distinct sutures and 

 the volutions more ventricose, while their surfaces are less strongly marked 

 by the longitudinal ril)s, and no spiral lines are visible; no evidence of 

 markings can be detected on the columella, either on the shell or on the 

 cast. The outer lip of the aperture appears to have been slightly thick- 

 ened, but no evidence of internal stria3 exists. The features of the notch 

 in the outer tip can not be ascertained. 



I see no reason to question the generic relations of this shell, although 

 some of the features are too obscure for positive description; those that 

 are retained seem too well marked for doubt. The same remarks made 

 under G. Crosswickensis in regard to generic references apply equall}' well 

 to this species. 



Formation and local iti/: In the dark ferruginous layers at the base of the 

 Lower Green Marls at MuUica Hill, New Jersey. State collection made 



