BRYOZOA OF THE PHILIPPINE REGION 387 



Genus CHEILOPORINA Canu and Bassler, 1923 



CHEILOPORINA FLAVA, new species 



Plate 53, figs. 10, 11 



Description. — The zoarium encrusts fragments of shells and dead 

 Adeonellopsis ; the ectocyst and the opercula are light colored. The 

 zooecia are distinct, separated by a shallow furrow or by a little 

 salient thread, somewhat elongated elliptical or lozenge-shaped; the 

 frontal is a little convex, perforated by very numerous and very 

 small tremopores. The apertura is subelliptical and transverse; 

 two cardelles, placed at the inferior third separate a broad poster 

 from a narrower anter; the peristome is broad, salient, separated in 

 two parts by two lateral notches. The ovicell is small, endozooecial, 



D E 



Fig. 146. — Opercula of Cheiloporina, X85 



A-C. C. caerulea, new species. Three forms. D, E. C. flava, new species. 

 Operculum of ordinary (D) and ovicelled zooecium (E). 



little salient; its operculum is larger and the apertura often bears a 

 small, little salient mucro. 

 Measurements. — 



Apertura!^ - ' 15 mm ' Zooeciajf 2 -0-60-0.70 mm. 



\la -0.20 mm. \lz =0.40-0.50 mm. 



Affinities. — The present species differs from Cheiloporina caerulea 

 in its transverse aperture and in its little visible ovicell. 



The structure of the operculum is very close to that of the geno- 

 type; the two faces are not identical, one of them bearing small 

 veins. It is very fragile, especially on the borders, and difficult to 

 prepare. 



Biology. — Our specimens were living and in reproduction in Febru- 

 ary, 1908 (39 meters). 

 Occurrence. — 



D. 5145. Jolo Light, Jolo; 6° 04' 30" N.; 120° 59' 30" E.; 



23 fathoms; co. S., Sh. 

 D. 5151. Sirun Island, Sulu Archipelago; 5° 24' 40" N.; 120° 

 27' 15" E.; 24 fathoms; co. S., Sh. 

 Holotype. —Cat. No. 8190, U.S.N.M. 



