BRYOZOA OF THE PHILIPPINE REGION 



229 



septulae. The avicularia are free. The radical fibers issued from 

 the lateral margins of the zooecia (after Levinsen, 1909). 



Genotype. — Bicellarina (Bicellaria) alderi Busk, 1852. Recent. 



Fig. 89. — Family Bicellariellidae Levinsen, 1909 



A, B. Bicellariella Blainville. Posterior and frontal faces of Bicellariella 

 ciliala Linnaeus, 1758, X33. C. Cornucopina Levinsen, 1909. Two zooeeia 

 of C. grandis Busk, 1852, X40. D. Dimetopia Busk, 1S52. View of D. xpicata 

 Busk, 1852. E. Petalostegus Levinsen, 1909. A zooecium of P. bicomis Busk, 

 1885. F, G. Bicellarina Levinsen, 1909. Frontal and dorsal sides of B. alderi 

 Busk, 1852. 



N. Dimetopia spicala Busk. Anatomy. The funnel shaped zooecium is 

 closed by a terminal frontal membrane which is depressed by a single pair of 

 parietal muscles (pm). cae, coccum of stomach; fm, frontal membrane (ectocyst); 

 occl., occlusor muscles of operculum; p.m., parietal muscles; pvm., parieto-vaginal 

 muscles and bands; vest, vestibule (diaphragm) ; z' , daughter zooecium; t, tentacles. 



O. Sketch of zooecia, X40, showing terminology; av., avicularium; ovic, 

 oviccll; t, lower part of zooecium in which the spermatozoa originate; ov., ova: 

 op., opercular valve, ect., opesium covered by the ectocyst. 



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