NORTH AMERICAN EARLY TERTIARY BRYOZOA. 591 



small pores. Tin 1 apertura is semilunar; it bears on its straight proximal bonier 

 a small linear rimule; the peristome is much developed into two la rye. lateral lips 

 circumscribing a sort of incomplete and very large spiramen. The ovicell is hyper- 

 stomial and recumbent: it t'urms a sort of small, punctured .tack placed on the 

 bottom of the zooeoium. A small vibraculoid avicularium is developed laterally 

 near the aperture. 



,, |/m=0.08mm. . (Zs=0.60-0.70mm. 



Alea&uremfntx. Apertura-, Zooecun, nonn^n 



I 7fl 0.10 mm. I Is 0.30-0.40 mm. 



Variations. The peristome is quite variable. The tremopores are often 

 obliterated by fossilization. The ovicell is truly recumbent or partially supported 

 on the distal zooecium (fig. 8). To accommodate so great a peristomial complexity 

 it is probable that the tentacles were very long and fine. 



Occurrence. Middle Jacksonian : Wilmington. Xorth Carolina (rare) : one- 

 half mile southeast of Georgia Kaolin Co. mine, Twiggs County, Georgia: 18 

 miles west of Wrightsville, Georgia. 



Cotypes.Cat. No. refill. F.S.N.M. 



Genus LAGENIPORA Hincks, 1877. 



1877. Lngrniiinra HINCKS, On British Polyzoa, Annals Magazine Natural History, ser. 4, 

 vol. 20. p. 215. 



" Colonies consisting of a number of cells immersed in a common calcareous 

 crust. Zooecia recumbent, contiguous, lageniform: oral extremity free, tubular, 

 with a terminal orbicular orifice." (Hincks.) 



Genotype. Lagenipora .sv-/W/.s' Him-lcs, 1STT. 



Range. Jacksonian Recent. 



Waters and Jullien did not admit that a long. free, peristomie could charac- 

 terize a genus. 



The first of these authors has preserved Hincks's name for all the species more 

 or less erect and provided with a cribriform area on the ovicell. Levinsen, in 

 1909, called Si.n-i-opeJta. the group of the species of Waters in which the growth 

 is that of the Cellepores. 



We have not the data for a discussion, and we preserve Hincks's genus. in his 

 exact meaning. It is indisputable that the genotype is one of the Phylactellidae on 

 account of the nature of its ovicell, and that the specimens discovered in our 

 Eocene are well classified in this family. 



LAGENIPORA AMERICANA, new species. 

 Plate 74, figs. 0. 



1>< Ki-riptioii. The zoarium incrusts shells. The zooecia are distinct, long, 

 lageniform, composed of two parts; the frontal is convex and garnished with 

 tremopores; the peristomiale is very long, oblique, smooth, terminated by an ex- 

 panded peristome. Ovicell unknown. 



