194 BULLETIJf 125, UNITED STATES NATIONAL MUSEUM. 



Forma BERENICEA Lamouroux, 1821. 



BERENICEA FLABELLUM7 Keuss. 1847. 



Plate 27, fig. 17. 



1847. Diastopora flabellum Reuss, Die fossilen Polyparien des Wiener Tertiarbeckons, Haidingers 

 naturwissenschaftliche Abhandlungen, vol. 2, pi. 7, fig. 9. 



The specimens from the Miocene of Virginia which we have referred doubtfully 

 as above liave the general zoarial aspect of Reuss's species, but without direct 

 comparisons we are unable to assert their identity positively. The measurements 

 of the American specimens are as follows: 

 Measurements. — 



Peristome 0.24 mm. 



Diameter of the orifice 0.18 mm. 



Distance between the peristomes 0.80-0.90 mm. 



Separation of the peristomes . O.SO mm. 



Occurrence. — Miocene (Yorktown formation) : Weavers Pond, Gloucester 

 County, and 3 miles southwest of Petersburg, Virginia (rare). 

 Geological distribution. — Miocene of the Vienna Basin. 

 Plesiotype.~Cat. No. 6872S, U.S.N.M. 



ATELESOPORA, new genus. 



Greek; Ateles, incomplete; in allusion to the lack of peristome. 



The tubes are expanded and have no peristome. 



This form of tubes was rather common in the Paleozoic era and during the 

 Cretaceous, and it has been noted in many families. It is very rare in the Tertiarj' 

 formations and in the recent seas, but its study has never been undertaken 

 seriously. 



Our generic definition is incomplete, since we are ignorant of the ovicell. In 

 giving a generic name to this group, our main purpose is to call the attention of the 

 zoologists to these singular remains of ancient periods. 



ATELESOPORA REPTANS. new species. 



Plate 26, figs. 4-6. 



Description. —The zoarium creeps over shells, in salient masses, more or less 

 flabelliform. The tubes are adjacent, irregular, polygonal. The zone of growth 

 is thick and irregular. 



Occwrrence.— Miocene (Duplin marl) : Muldrows Mills, 5 miles south of Mayville, 

 Sumter County, South Carolina (rare); and Natural Well, 2 miles southwest 

 Magnolia, Duplin County, North Carolina (rare) . Miocene (Yorktown formation) : 

 3 miles southwest Petersburg, 1 mile northeast, and 1 mile west of Suffolk, 1 mile 

 west of Fort Nonsense, Gloucester County, and Beulahland, King and Queen 

 County, Virginia (rare). 



Cotypes. —Cat. Nos. 68729-68731, U.S.N.M. 



