386 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Genus CHEILOPORA Levinsen, 1909 



CHEILOPORA(?) GRANDIS, new species 



Plate 53, fig. 9 



Description. — The zoarium encrusts bryozoa (Stylopoma). The 

 zooecia are distinct, separated by a deep furrow, large, elliptical, 

 more or less broad; the frontal is convex, thick, granular, covered 

 with numerous tremopores; it bears on the median axis an oblique 

 triangular avicularium with beak pointed and turned superiorly. 

 The apertura is buried at the bottom of a deep peristomie; the 

 peristome is broad and salient; the peristomice is orbicular or trans- 



Fig. 145. — Genus Triporula Canu and Bassler, 1927 



A, B. Triporula stellata Smitt, 1873. A. Zooecia enlarged, the shaded one 

 showing the primary aperture almost unaltered. B. Zooecia showing different 

 forms of the aperture. (After Smitt, 1873.) 



verse. * The ovicell is endozooecial, convex, of the same structure 

 as the frontal and is borne on a zooecium with a large aperture. 



Measurements. — 



=0.10 mm. 



= 0.10-0.15 mm. 



Affinities. — This species is probably not a true Cheilopora but we 

 have classed it provisionally in this genus not having been able to 

 procure a specimen with opercula. 



Occurrence. — From an unknown locality in the Philippines. 



Holotype—C&t. No. 8189, U.S.N.M. 



Peristomice] 7 ^ 



Up * 



Zooecia!^ = 1 -° A mm - 

 U2-0.70 mm. 



