SECONDARY AND TERTIARY FORMATIONS OF NORTH AMERICA. 129 



C. tessellata, Tuomey and Holmes, Pliocene of South Carolina, p. 13, pi. 4, f. 7. 



" C. incrustans; eellulis minimis, subglobosis, depressis, quiacuncialibus, interstitiis impressis ; ore 

 minimo, constricto." 



"Incrusting; cells small, somewhat globular, flattened, quincunx, with the boundaries between the cells 

 defined by an impressed line; mouth small, contracted, slightly lipped ; a small closed tubercle on the side3 

 of the cells, which is sometime conspicuously open." 



"The depressed globular form and great regularity of arrangement distinguishes this species." 



" Giles Bluff, Pee Dee River." " Pliocene." 



The extreme breadth of the cellules, making them almost square (according to 

 the figure) will serve to distinguish this species in the absence of almost every other 

 character. 



C. radiata, T. and H., Pliocene of South Carolina, p. 13, pi. 4, f. 8. 



" C. incrustans ; eellulis ovato-oblongis ventricosis, subimbricatis, radiantibus, quincuncialibus ; ore 

 rotundo." 



" Incrusting ; cells oval-oblong ventricose, radiating, quincunx." 



" This fossil is found in irregular patches, consisting of a single layer of cells on the surface of other 

 fossils. Near the proximal edge of the mouth, which is not at all thickened, there is a small tubercle which 

 is generally perforated, showing under the microscope a minute foramen." 



"Locality.— Goose Creek, S. C." " Pliocene." 



C. depressa, T. and H., Pliocene, South Carolina, p. 14, pi. 4, f. 9. 



" C. incrustans ; eellulis depressis, ellipticis, quincuncialibus ; ore rotundo, prominulo, labiato, tuber- 

 culoso." 



"Incrusting; cells depressed, elliptic, quincunx ; mouth circular, slightly prominent, margined, tuber- 

 culose." 



" The cells are much flattened, somewhat indistinct, and separated by a depressed line. The mouth is 

 small and depressed, with the lip slightly raised and thickened, On each side of the mouth there is a 

 minute tubercle. 



Occurs with the preceding. The sides appear to be parallel, and the top of the 

 cellule sloping upwards from its proximal margin to the proximal margin of the aper- 

 ture, which, from the figure, seems to point upwards and forwards. 



C. urceolata, n. s., fig. 11. — Colony composed of large cellules, disposed in radiating 

 lines and irregular quincunx. Cellules oval, very convex, depressed posteriorly, ele- 

 vated anteriorly so as to present an imbricating appearance. Mouth circular, ter- 

 minal, looking slightly forwards ; bordered by a large collar-like lip, thinnest and 

 lowest anteriorly, elevated at the proximal corners and depressed in the middle of the 



ing of the numerous beds of sands and clays overlying the Eocene, from New Jersey to Carolina, he speaks of 

 Mr. Conrad having referred them to the Miocene, because he found in them about fourteen per cent, of living 

 species. He then gives a table showing the per centage of living forms, in beds characterized in the main by 

 the same series of fossils, in four States, as follows : — 



New Jersey has 13 per cent. ; Virginia, 18 per cent. ; North Carolina, 34 per cent. ; South Carolina, 42 per 

 cent. Thus showing, as far as we have the means of knowing at present, that the same beds, or more likely beds 

 of the same group, in one place are, according to the now generally received rules, miocene in one locality and 

 pliocene in another. — W. M. G. 



