BRYOZOA OF THE PHILIPPINE REGION 



279 



Description. — The zoarium encrusts nullipores and foraminifera; 

 its color is light or rose tint. The zooecia are distinct, separated by 

 a deep furrow at the bottom of which is often a salient thread, very 

 large, elongated, oval, spread out; the frontal is convex, granular, 

 perforated by a multitude of very small tremopores. The aperture 

 is oval, elongated, formed of a very large anter separated from a 

 small concave poster by two cardelles placed low; the peristome is 



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Fig. 114. — Genus Gephyrophora Busk, 1884 



A-G. Gephyrophora polymorpha Busk, 1884. A. Zooecia, X25 (after Busk, 

 1884). B. Zooecia, X25. C, D. Longitudinal section, X4 and X25, showing 

 the ovicell (ov) opening in the peristomie above the operculum (op). E. Oper- 

 culum, X85. (B-E. After Waters, 1889.) F, G. Operculum and avicularian 

 mandible, X85. 



H. Gephyrophora (Schizoporella) vitrea MacGillivray, 1879. Operculum, X85 

 (after Waters, 1888). 



I. Gephyrophora (Schizoporella) polymorpha Waters, 1904. Operculum, X 85. 

 (F-I. After Waters 1904.) 



J-O. Gephyrophora rostrigera Waters, 1887. J, K, L. Different forms of 

 opercula of nonovicelled zooecia, X75. M, N, O. Opercula of ovicelled zooecia, 

 X75. 



wide, smooth, somewhat salient. The peristomice bears two trans- 

 verse triangular avicularia with pivot; the beak is turned toward 

 the median axis of the zooecia. The ovicell is large, globular, bord- 

 ered by a smooth, salient thread very much immersed in the distal 

 zooecium, of the same nature as the frontal. The operculum of the 

 ovicelled zooecia is wider; the proximal border is very thick. 



