Plate 56 



Figs. 1, 2. Perigastrella ovalis, new species (p. 403). 



1. Ovicelled zoarium incrusting a pebble, X20, showing an ancestrula 



without aperture. 



2. Another example, X20, in which the ancestrula shows an aperture. 



D. 4807. Cape Tsiuka, Sea of Japan. 

 3-8. Par miliaria cylindrical, new species (p. 401). 



3. Portion of the bilamellar zoarial segment, X20, showing a tripartite 



ovicell. 



D. 5141. Jolo Light, Jolo. 



4. Lateral portion of another segment, X 20, exhibiting the endozooecial 



ovicell. 



D. 5137. Jolo Light, Jolo. 



5. General arrangement of zooecia, X20, on a lotted segment. The tre- 



mopores are little expanded. 

 D. 5145. Jolo Light, Jolo. 

 0. A lanceolate segment, X20, exhibiting general position of the zooecia. 

 D. 55S0. Darvel Bay, Borneo. 



7. Median section showing the interior of the curved zooecia, X20. 



The median axis of the colony, the two longitudinal median rows 

 of zooecia and the septulae on the basal lamella are evident. 

 D. 5144. Jolo Light, Jolo. 



8. Base of a segment and its branch, edge view, X20. The basal cells 



are cylindrical and divided into small longitudinal partitions. 

 D. 5151. Sirun Island. 



(623) 



