BRYOZOA OF THE PHILIPPINE REGION 



Genus DIATOSULA Canu and Bassler, 1927 



293 



The ovicell is hyperstomial and opens in the peristomie; it bears 

 a triangular area bordered with pores. The frontal is very thick 

 and smooth. The apertura is formed of a large anter separated 

 from the small poster by two cardelles. The peristomice bears a 

 pseudo-rimule limited laterally by two peristomial avicularia more or 



Fig. 123. — Genus Diatosula Cann and Bassler, 1927 



A-D. Diatosula marionense Busk, 1884. A. Zoarium natural size. B. Young 

 distinct zooecia, X25. C. Old indistinct zooecia, X25. D. Details of the orifice 

 showing the oral avicularia and the peristomie, X50. (A-D. After Busk. 1884.) 



E-I. Diatosula marionense Calvet, 1903 (not Busk, 1844). E. Ovicelled 

 zooecia, X40. F. Real form of the aperture at the bottom of the peristomie, 

 X100. G. Operculum, X 100. H. Mandible of a peristomial avicularium, X 260. 

 I. Mandible of an interzooecial (zoarial) avicularium, X90. (E-I. After Calvet, 

 1909.) 



less salient and more or less visible. On the frontal a large spathu- 

 lated avicularium sometimes appears. 



Genotype. — Myriozoum marionense Busk, 1884. Recent. 



Waters, 1903 (p. 47), says that the species of Calvet, 1903, is not 

 that of Busk, 1884. They certainly belong to the same genus and our 

 definition is in agreement with the text and figures of Calvet. 

 Waters, 1913 (p. 130), said that Busk's species should be more a 

 Cellarinella; but the latter genus belongs to a group deprived of 

 opercula. 



2182—29 20 



