80 PROCEEDINGS OF THE NATIONAL MUSEUM, vol.61. 



Subdivision Rectangulata Waters, 1887. 



In this convenient and well-marked subdivision of the Cyclosto- 

 mata the ovicell is developed between the peristomes perpendicularly 

 to the axis of the terminal zooecia and not between the tubes and 

 parallel with this axis as in the subdivision Parallelata. The Rec- 

 tangulata include most of the so-called " heteroporoids " and " cerio- 

 poroids," although in the type species of both Ileteropora and Cerio- 

 pora the ovicell has not yet been discovered, and the position remains 

 doubtful. 



Family LICHENOPORIDAE Smitt, 1866. 



Figures and descriptions of this family and its genera are given in 

 Bulletin 106, United States National Museum. The following spe- 

 cies of Licheno'pora is introduced on account of its peculiarities : 



Genus LICHENOPORA Def ranee, 1823. 



LICHENOPORA BURDIGALENSIS Duvergier, 1921. 



Plate 12, figs. 1-3. 



1821. Lichenopora hurdigalensis Duvebgier, Note sur les bryozoaires du 

 Neogene (le I'Aqiiitaine, Actes Societe Linneenne de Bordeaux, vol. 72, 

 p. 41, pi. 4, figs. 11-13. 



The type and only specimen is incomplete. The tubes appear nar- 

 row, arranged in radial, uniserial rows, but not in fascicles. The 

 cancelli are large and polygonal and occupy almost all of the zoarium 

 observed. The ovicell is large, flat, surrounded by numerous ramifi- 

 cations situated between the rows of tubes ; its surface is very finely 

 porous; the marginal thread is thick and salient. On the inferior 

 face the tubes are arranged eccentrically in a manner to form a 

 flabelliform ensemble as in Berenicea. 



Among the recent species, Lichenopora californica Busk, 1875, 

 and L. holdsworthii Busk, 1875, have an analogous ovicell. The 

 discovery of this fossil species is therefore quite important, and the 

 entire group will probably be separated genorically when the oecio- 

 stome is better Imown. In the other species of Lichenopora the ovicell 

 is a central expansion not marginated and not digitate. 



Occwrreruie. — Miocene (Upper Burdigalian) : Saucats (Pontpour- 

 quey) Gironde, France. 



LOBOSOECIIDAE, new family. 



The ovicell is a convex lobed vesicle formed after the consolidation 

 of the subjacent tubes. The oeciostome is central, large, transverse, 

 salient; the oeciopore is larger than the aperture. 



This family differs from the Eleidae, in which the tubes are also 

 provided with a zooecial area, in its central and not terminal oecio- 



