BRYOZOA OF THE PHILIPPINE REGION 



91 



The genus Cribrendoecium Canu and Bassler, 1920, is now referred 

 to this family as it is derived normally from Hincksina. The follow- 

 ing genus Aplousina also has the family character in simple form. 



t r 



L>\ O 6 O O Ooo\ 



Fig. 21. — Genus Retifluslra Levinsen, 1909 



A-H. Retifluslra reticulum Hincks, 1882. A. Dorsal surface of a zoarium, 

 X2. B. Portion of zoarium with avicularium and projecting chitinous tubes, 

 X12. (A, B after Waters, 1896.) C. Group of zooecia, X23. D. A zooecium 

 with ovicell, lateral view, X40. E. Basal surface. The uppermost zooecium 

 in the central row is furnished with an ovicell, X23. (C-E, after Levinsen, 

 1909.) F, G. Lateral and distal wall, X25. H. Avicularian mandible, X85. 

 (F-H. After Waters, 1896.) 



I-L. Retifluslra schonaui Levinsen, 1909. I. With a pear-shaped avicularium, 

 X40. J. A young zooecium with ovicell, X40. K. Another zooecium with 

 ovicell. The proximal part of the ovicell is covered by a cryptocyst belt; X40. 

 L. Basal surface, X23. 



M-O. Retifluslra cribriformis Busk, 1853. M, N. Lateral and distal wall, 

 X 25. O. Showing the radical attachment, and from the cells on the right the 

 upper wall has been removed to show the basal wall, X 12. (M-O. After Waters, 

 1889 and 1896.) 



Genus APLOUSINA Canu and Bassler, 1927 



The ovicell is endozooecial. No spines, no avicularia, no dictellae. 

 Genotype. — Aplousina gigantea Canu and Bassler, 1927. Recent, 

 Gulf of Mexico. 



