BRYOZOA OF THE PHILIPPINE REGION 



231 



Genus DIMETOPIA Busk, 1852 



The free ovicell issues from the boundary between two zooecia 

 placed in the same longitudinal row. The zooecia in pairs apposed 

 back to back, each pair facing in a direction at right angles to that 

 of the next; at a bifurcation each of the separate zooecia gives off 

 a secondary pair. The distal wall furnished with four uniporous 

 scptulae each of which is placed at the bottom of a separate chamber 

 (Levinsen 1909). 



Genotype. — Dimetopia cornuta Busk, 1852. Recent. 



Genus CORNUCOPINA Levinsen, 1909 



The zooecia widening from a long, tube-shaped proximal end 

 obliquely upwards, funnel-shaped, with a ring-shaped constriction 



&• 



^(d 



Fig. 92. — Genus Dimetopia Busk, 1852 



A. Dimetopia spicata Busk, 1852. Portion of a zoarium. 



B-D. Dimetopia cornuta Busk, 1852. B. Several zooecia. The distal wall is 

 furnished with four uniporous septulae, each of which is placed at the bottom of 

 a separate chamber. No avicularia. C. Ovicell. D. Zoarium natural size. 

 (A-D. After Busk, 1852.) 



at a greater or less distance from the distal wall. The ovicells which 

 are not placed between two zooecia in the same longitudinal row 

 but on the zooecial distal margin, which is directed outwards from 

 the middle of the colony, are surrounded by kcnozooecia. The 

 radial fibers which run down along the basal side of the colony issue 

 far distally on the individual zooecia (Levinsen, 1909). 



Genotype. — Cornucopina (Bicellaria) grandis Busk, 1852. Recent. 



