42 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. 69 



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Fig. 4. Mesostomaria strictoramae, new genus and species r> 



Portion of a segment with several ovicelled zooecia. The 

 endotoichal ovicell is convex and opens by a large orifice 

 placed obliquely about the aperture. 



Albatross Station D. 5162. Tinagta Island, Philippines. 



5. Cryptostomaria crassatina, new genus and species 4 



Portion of a zoarium exhibiting the endotoichal ovicell as a 

 semicircular convexity without apparent opening. 

 Albatross Station D. 5577. North of Tawi Tawi, Philippines. 



6. Tretosina arcifera, new genus and species 3 



Surface of the bilamellar zoarium illustrating nature of the 

 zooecia with the two small anterior perforations through 

 which the eggs escape. 



Tertiary (Balcombian) Muddy Creek, Victoria, Australia. 



7. Coleopora verrucosa, new genus and species 6 



Zooecia of the incrusting zoarium showing the inner peris- 

 tome and the shield in the form of a sheath above it. 

 Albatross Station D. 5137. Jolo, Philippines. 



8. Cosciniopsis coelatus, new genus and species 6 



Zooecia illustrating the porous peristomial ovicell closed by 

 the operculum and the aperture with two cardelles placed 

 low. 



Albatross Station D. 5141. Jolo Island, Philippines. 



9. Gemelliporidra typica, new genus and species 7 



Surface of a multilamellar ovicelled zoarium, much calci- 

 fied, showing the spatulate transverse avicularia. 

 Albatross Station D. 2337. North of Cuba, Gulf of Mexico. 



10. Psilopsella uniseriata, new genus and species 8 



Zooecia exhibiting presence of parietal dietellae, and a 

 row of areolar pores surrounding the smooth frontal. 



Albatross Station D. 5217. Anima Sola Island, Philippines. 



11. Anoteropora magnicapitata, new genus and species 10 



Ovicelled and ordinary zooecia from marginal part of the 

 cupuliform zoarium. The aperture of the ordinary zooecia 

 is elliptical with two submedian cardelles, while that of the 

 ovicelled zooecia is much larger and transverse. 



Albatross Station D. 5145. Jolo Island, Philippines. 



12. Trochosodon linearis, new genus and species 11 



Part of the convex zoarium differing from Conescharellina 

 in form and in the absence of avicularia and the presence of 

 recumbent zooecia. 



Albatross Station D. 5586. Sibuko Bay, Borneo. 



13. Actisecos regularis, new genus and species 11 



Celluliferous side of the orbicular zoarium showing the 

 tubular zooecia swollen at their base with six arranged about 

 the ancestrula, the porous frontal and the peristomial ovicell. 



Albatross Station D. 5335. Linapacan Strait, Philippines. 



o 



