BRYOZOA OF THE PHILIPPINE REGION 



481 



( = luneocia Levinsen, 1909) the authors have noted the presence 

 of small special openings perforating the colony; they are always 

 very rare and the greater part of the colonies are deprived of 

 them. They have been observed only in the following species; C. 

 philippinensis Busk, 1854 (Maplestone 1910, Waters 1921), C. 

 angulopora T. Woods, 1880 (Whitelegge, 1887, Waters 1921, Levin- 

 sen 1909), Bipora elegans Whitelegge, 1887 and Trochosodon decussis, 

 new species. The great rarety of these zooeciules indicate that they 



Fig. 206. — Thin sections of Conescharellina, all X 10 



A. C. jucunda, new species. Meridian section. B. C. milleporacea, new spe- 

 cies. Meridian section. C, D. C. catella, new species. Transverse and median 

 section. E. C. delicatula, new species. Meridian section. F. C. elongata, new 

 species. Transverse section in the vicinity of the base. The shaded cells are 

 cut tangentially with their walls. G, H. C. breviconica, new species. G. Merid- 

 ian section through a small colony in which the base is little cancellated. H. 

 Similar section through a large colony with much cancellated base. 



are only morphological accidents and their study is absolutely 

 secondary. 



We have observed much more frequently and on almost all the 

 species, "special zooecia" characterized by the presence of a very 

 large orbicular aperture. These are perhaps gonoecia but we have 

 no proof in confirmation of this idea. They are not incomplete 

 zooecia for they are arranged among the others. (PI. 68, fig. 4.) 



The zoarial architecture is not so beautiful nor so varied as that in 

 Flabettopora, in which the diversity of forms is remarkable; large or 

 small, broad or elongated, it is always a cone. 



The exterior ornamentation is certainly a special adaptation of a 

 function determined by the aquatic medium and which is difficult 



