NORTH AMERICAN EARLY TERTIARY BRYOZOA. 



669 



Variations. Our zoarium is unfortunately incomplete. We can note, however, 

 the great irregularity in the arrangement of the tubes; they are more scattered on 

 one branch than on another; the length of their peristomie is quite variable; the 

 separation of the peristomes varies from one to two times. It is impossible to 

 clearly characterize this species. 



Occurrence. Jacksonian (Zeuglodon zone) : Bluff on south side of Suck 

 Creek, Clarke County, Mississippi (very rare). 



Holotype.Cnt. No. 65295, U.S.N.M. 



Forma BERENICEA Lamouroux, 1821. 



1821. lici'cniccn LAMOUBOVX, Exposition Methoilique des polypiers, p. 80. 



The zoarium is a thin, unilamellar, incrusting sheet. It is generally orbicular, 

 suborbicular, or flabelliform. 



Genotype. Berenicea prominens Lamouroux, 1821. 



Range. Ordovician-Eecent. 



Like Proboscina the ancient name Berenicea is retained in a zoarial sense to 

 include those species of lamellar incrusting Cyclostomata, showing no ovicell. As 



basal lamella-- 

 zone of 



distance 



peristonie \ 



peristone -'*' P 



FIG. 236. Forma Berenicea Lamouroux, 1821. 



A-C. Two species of Berenicea showing the terminology employed in this and similar Cyclos- 

 tomata. 



noted on subsequent pages, species of Berenicea preserving ovicell are referred to 

 several distinct genera and indeed families. A large number of species have the 

 ovicell of Plagioecia, but others belong to Oncousoecia, Mecynoecia, Microecia, 

 Diaperoecia, and Diplosolen. 



BERENICEA PALMULA, new species. 



Plate 105, figs. 5, 6. 



Description. The zoarium incrusts shells and is formed of flabettifonn, bifur- 

 cated, short, pluriserial branches. The zone of growth is much reduced. The tubes 

 are little distinct, oval, smooth, arranged in quincunx. The peristomie is short, 



