139 Miocene Fossils, Olsson 19 



well up to the apex ; the base is more strongly spirally sculptur- 

 ed than the upper surface ; the basal spirals are irregular and 

 minutely decussated by the growth lines ; whorls strongly cari- 

 nated just above and below the periphery, and with the interme- 

 diate surface strongly sculptured with fine spirals similiar to 

 those found on the upper surface ; mouth oblique, rounded. 



Greater diameter 1.75, height .75 mm. 

 Is readily determined by its possessing only 2 carinse and 

 by its flattened upper and lower surface. 



Duplin formation ; Natural Well, N. C. 



Calliostoma harrisianum, n. sp., Plate 2, Fig. 7 



Shell of usual size, conic, with straight-sided whorls, and a 

 narrow grooved periphery ; base flattened or only slightly con- 

 vex ; whorls 5, separated by deep, excavated sutures ; upper sur- 

 face of whorls with 2 heavy, raised spirals, one bordering the su- 

 ture, the other at the periphery ; the space between these 2 pri- 

 mary spirals, carries 3 additional, smaller spirals ; the spirals 

 may be granulated or smooth, and the peripheral carina is fre- 

 quently double ; base flattened, imperforate, and strongly sculp- 

 tured with 6 or 7 smoothish spirals which are wider than their 

 interspaces ; mouth subovate, oblique. 



Greater diameter 7.5, height 6.5 mm. 



A well-marked species known at present only from King- 

 mills. Related to C. virginicum. 



Yorktown formation ; Kingmills, Va. 



Calliostoma suffolkense, n. sp., Plate 2, Fig's 8, 9 



Shell moderate in size, depressed, with flat upper whorls, a 

 conic spire and angulated periphery ; base flattened, with a nar- 

 row steep -sided umbilicus which is smooth within ; just above 

 the periphery, a carina is present which is posterior to the suture 

 on the later whorls of the spire, lacking from the earlier ; whorls 



