150 PROCEEDINGS OF THE NATIONAL MUSEUM vol, 72 



Occurrence. — Pliocene : Minnitimmi Creek, Bpcas Island, Almirante 

 Bay, Panama. 

 Albatross Station D. 2405, Gulf of Mexico. 

 Plesioty pes. —C&t. Nos. 7588, 70855, U.S.N.M. 



Genus CELLEPORA Linnaeus, 1767 



CELLEPORA MINUTIPOROSA new species 



Plate 28, Figure 1 



Description. — The zoarium encrusts corals. The zooecia are dis- 

 tinct, large, poorly oriented, little erect, noncumulate. The frontal 

 is convex and covered with a large number of very small pores. The 

 apertura is subcircular and bears a very broad, round rimule. The 

 oral avicularium is triangular, ascending and adjacent to one side of 

 the apertural rimule. The ovicell is recumbent, relatively small, 

 not closed by the operculum. The interzooecial avicularium is large 

 with spathulate mandible; there are other small avicularia with 

 semicircular mandibles. 



Measurements. — Aperturai , 



Ua = 0.20 mm. 



-r, , ^ . [Z2 = 1.40 mm. 



Jxecumbent zooeciai, ^„^ . ..^ 



Us = 0.75-1. 10 mm. 



Affinities. — Our specimens were dead and without chitinous organs, 

 so that we have not been able to make a complete study of the 

 species. Probably a special genus will be necessary in order to admit 

 species with such structure and in which the cells are not heaped on 

 top of one another. 



Occurrence.— Albatross Station D. 2662, Atlantic; 29° 24' 30" N.; 

 79° 43' W.; 434 fms.; gray sand and broken shells. 



Eolotype. —Csit. No. 7474, U.S.N.M. 



Family LIRIOZOIDAE Levinsen, 1909 



Genus PASYTHEA Lamouroux, 1812 (GEMELLIPORA Smitt, 1873, part) 



"Zooeciumin the erect portion pinnate. Stem at first a double 

 calcareous tube, then a succession of geminate zooecia of which two 

 pairs constitute an internode, from the side of which equidistant^ 

 opposite pinnae, also composed of geminate zooecia, are given off 

 at right angles. Zooecia geminate, closely connate, subcompressed, 

 the oral portion subtubular and twisted round to opposite faces, 

 front and back, in each pair. Surface smooth, entire, with a row of 

 four to six punctae on each side and a few on the front. Peristome 

 slightly thickened." (Busk, 1874.) 



Genotype. — Cellaria tulipifera Ellis and Solander, 1786. 



History. — The names Pasytliea Lamouroux, 1812, and Liriozoa 

 Lamarck, 1812, have been applied to the same species, Cellaria tulip- 



