BRYOZOA OF THE PHILIPPINE REGION 



245 



of the Escharellidae. Hinek's definition of the family follows: 

 "Zooecia having the front wall wholly ealcified and destitute of 

 raised margins or depressed areas, with a more or less orbicular 

 orifice." No ectocyst. 



Family EUTHYROIDAE Levinsen, 1909 



The zooecia are slightly calcified and have no pores and no ectocyst. 

 On the proximal side of the operculum they are provided with 1-3 

 pairs of flat hollow spines which meet in the central line and cover 

 the entrance of the compensatrix. The operculum is compound. 

 The lateral walls have multiporous septulae. Interzooecial avicularia 

 occur. The ectooecium of the hyperstomial ovicell is provided with a 



A B 



Fig. 101. — Genus Jolietina Jullien, 1886 



A, B. Jolietina (Cribrilina) latimarginata Busk, 1884. A. Calcined zooecia, 

 X25. A thick calcareous growth is seen surrounding the area, leaving small tri- 

 angular hollows where the neighboring zooecia meet or nearly meet, and a thick 

 membrane covers the whole. B. The vibraculum has a process at one side of the 

 base and this is situated below the bar, with one muscle attached to it and two 

 powerful ones higher up. The base is unsymmetrical, X150. (After Waters, 

 1889.) 



pair of large fenestrae. The zoaria are free, branched, flustra-like 

 (after Levinsen, 1909). 



This family is close to Arachnopusidae and to Cyclicoporidae, and 

 to the genus Figularia Jullien. 



Genus EUTHYROIDES Harmer, 1903 



Characters as above. 



Genotype. — Euthyroides (Carbasea) episcopalis Busk, 1852. 

 Range. — Recent (Australia). 

 2182—29 17 



