Maryland Geological Survey 453 



spirals ; cordate secondaries introduced midway between the primaries 

 on the body whorl and upon the shoulder ; axial sculpture less regular in 

 character and spacing than the spiral, axials rather more closely spaced 

 than the primary spirals, excepting toward the aperture where they are 

 more distant; entire surface finely and regularly striated by the incre- 

 mentals. 



Well preserved casts are cancellated by the axials and primary spirals, 

 but show no trace of any secondary spiral . sculpture. The species is 

 represented in Maryland by a single crushed cast to which fragments of 

 the shell substance still adhere. 



Occurrence. — Monmouth Formation. Brightseat, Prince George's 

 County. 



Collections. — Maryland Geological Survey, Philadelphia Academy of 

 Natural Sciences, New Jersey Geological Survey. 



Outside Distribution. — Matawan Formation. Wenonah sand, New 

 Jersey. Monmouth Formation. Navesink marl. New Jersey. 



Pyropsis lenolensis Weller 



Plate XVI, Pig. 3 



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

 p. 752, pi. lxxxviii, figs. 20-24. 



Description. — " Shell small, and, exclusive of the anterior beak, sub- 

 globular in form, with about four volutions; the dimensions of a nearly 

 complete individual are : Height 13 mm., probable height, if anterior 

 beak were complete, 18 mm., maximum diameter 11.5 mm., height of spire 

 4 mm. The volutions distinctly flattened above in a spiral band just below 

 the suture, the outer margin of the flattened band being elevated in a 

 moderately strong revolving rib, below this rib the outer volution is nearly 

 regularly convex to the base of the anterior canal, which is rather elongate 

 and slender; surface of the outer volution marked by about six or seven 

 strong, revolving ribs between the outer margin of the flattened band 

 above and the base of the anterior beak, the outer half of the volution 

 being also marked by several rather strong, vertical varices which are 



