452 Systematic Paleontology 



Pyropsis retifer (Gabb) Whitfield 

 Plate XV, Figs. 9, 10 



Fusus reiifer Gabb, 1860, Jour. Acad. Nat. Sci., Phila., 2d ser., vol. iv, p. 



301, pi. xlviii, fig. 11. 

 Fusus 1 retifer Meek, 1864, Check List Inv. Fossils, N. A., Cret. and Jur., 



p. 22. 

 Perissolax retifer Conrad, 1868, Cook's Geol. of New Jersey, p. 730. 

 Pyropsis retifer Whitfield, 1892, Mon. U. S. Geol. Survey, vol. xviii, p. 38, 



pi. ii, figs. 1-4. 

 Dolium (Doliopsis?) multiliratum Whitfield, 1892, Ibidem, vol. xviii, p. 



121, pi. xv, figs. 4-6. 

 Pyropsis retifer Johnson, 1905, Proc. Acad. Nat. Sci., Phila., p. 24. 

 Pyropsis retifer Weller, 1907, Geol. Survey of New Jersey, Pal., vol. iv, p. 



749, pi. lxxxviii, figs. 7-13. 



Description. — "Shell pyriform; spire slightly elevated; mouth wide, 

 outer lip slightly reflected ( ?) ; surface crossed by two series of impressed 

 lines so as to present a pavement-like appearance." — Gabb, 1860. 



Type Locality. — Mullica Hill, New Jersey. 



" Shell small, pyriform, or without the anterior canal subglobular in 

 form, the dimensions of a large individual being: Height 22 mm., or 

 probably 25 mm., if the anterior beak were complete ; maximum diameter 

 18 mm. ; height of spire 6 mm. Volutions about three, rounded, ventri- 

 cose and rapidly increasing in size, rapidly contracting below to the short 

 anterior beak, spire low, conical, sutures well marked in the cast ; aperture 

 large, subcircular on the outer margins, about two-thirds as high as the 

 total height of the shell; columellar cavity in the cast rather narrow. 

 Surface of the casts marked by eight or ten spiral ridges upon the body 

 volution, placed at nearly equal intervals, also by fainter vertical ridges 

 which appear usually to have been placed at nearly equal intervals to those 

 of the spiral ridges, though occasionally they are somewhat closer. Upon 

 the external surface, as shown in impressions of the outside, the revolving 

 and vertical ribs are much more conspicuous than on the casts, their inter- 

 sections being marked by small, rounded nodes." — Weller, 1907. 



External surface sculptured with broad flattened spirals, three in num- 

 ber on the penultima and nine in number on the ultimate whorl, separated 

 by the flattened or feebly concave interspiral areas, double the width of the 



