Maryland Geological Survey 479 



Urge of secondary prominence ; aperture subeircular, peristome continu- 

 ous; umbilicus probably closed in fresb specimens by the reflected inner 

 lip. 



Dimensions. — Altitude of ultima and penultima 10.7 mm., maximum 

 diameter 8.6 mm. 



The Maryland species strongly suggests the species which Whitfield 

 described from a Monmouth cast under the name of Turricula scalari- 

 formis. The spiral sculpture seems coarser and the base of the body is 

 apparently more angulated in the New Jersey form. 



The characters of the aperture of Whitfield's species are not known, in 

 fact, the condition of the unique type is such that Whitfield apologized for 

 its introduction into the literature. 



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

 County. 



Collection. — Maryland Geological Survey. 



Epitonium cecilium n. sp. 

 Plate XV, Figs. 11, 12 



Description. — Constituent whorls subeircular in cross-section, coiled 

 so that they are barely in contact, probably numerous and very gradually 

 diminishing in size toward the apex; external surface ornamented with 

 heavy laminar varices, about twenty-one to the whorl, equal in size and 

 perfectly regular in arrangement ; aperture holostomous, circular ; char- 

 acters of outer lip not preserved. 



Imperfect as this Epitonium is, a description has been offered because 

 it is an unusually well characterized species occurring in a locality where 

 the chances of finding perfect specimens are exceedingly poor. 



The species suggests E. annulatum Morton, but the whorls are more 

 rounded and less rapidly increasing in size. From E. marylandicum it is 

 separated by its more rounded whorls. Looser coiling and finer orna- 

 mentation. 



Occurrence. — Monmouth Formation. Sassafras Eiver, Kent County. 



Collection. — Maryland Geological Survey. 



