498 SYSTEMATIC PALEONTOLOGY 



margin toward which it slopes abruptly. Surface coarsely reticulate and 

 punctate. Processes, three to seven. Diam. av. .181 mm. 



Occurrence. — Calvert Formation. Flag Pond, | mile south of 

 Parker Creek, 3 miles north of Parker Creek, Plum Point, ^ mile north 

 of Forest Wharf, Nomini Bay, Chesapeake Beach, God's Grace Point, 

 Fairhaven, 1 mile west of Tracy Landing, 1^ miles southeast of Marriott 

 Hill, 1 mile north of Jewell, 1 mile north of Jones Point, 1 mile south 

 of Chesapeake E. E. Bridge, 1 mile northwest of West Eiver, 1 mile east 

 of Marriott Hill. 



Collection. — ^Maryland Geological Survey. 



AuLACODiscus CRUX Ehrenbcrg. 



AuLACODiscus margaritaceus var. molleri Grunow 



AuLACODiscus sollittanus ISTorman. 



Genus EUPODISCUS Ehrenberg. 



EupoDiscus iNCONSPicuus Eattray. 



Plate CXXXV, Figs. 6, 7. 



Eupodiscus inconspicuus Rattray, 1888, Trans. Roy. Mic. Soc. London, vol, ix, p. 911. 



Description. — Valve circular with flat surface. Markings in irregu- 

 lar rows, hexagonal, finely punctate, 1^ to 2 in .01 mm., on the larger 

 forms, smaller near the margin. Ocelli 3 to 11 on the narrow hyaline 

 border. Diam. .171 mm. (of larger forms). Eattray's description 

 applies to small forms only with 4 ocelli. 



This form may possibly be Eupodiscus radiatus var. antiqua J. D. 

 Cox (Ms.). Eattray states that "it shows no close affinity" to E. radi- 

 atus. The larger forms, however, approach very nearly in appearance, 

 except in the number of ocelli, to the form known as radiatus so abun- 

 dant along the southern coast of the United States. 



Occurrence. — Calvert Formation. Near Parker Creek, Plum Point, 

 Flag Pond, Fairhaven, Chesapeake Beach, God's Grace Point. (Not 

 common. ) 



Collection. — Maryland Geological Survey. 



