Plate 32 



All the specimens here illustrated are magnified 20 diameters and are from the 



Pliocene of Bocas Island, Almirante Baj^, Panama. 



Page 

 Fig. 1. Aetea truncata Landsborough, 1852 51 



2. Vibracellina laxibasis, new species 23 



Two examples completely incrusting small pebbles. 



3. Alderina pyriformis, new species 28 



Surface of the unilamellar zoarium, with pyriform zooecia. 



4. Alderina irregularis Smitt, 1873 27 



The Pliocene specimen, referred to this species. 



5. Hippoporina cleidostoma Smitt, 1873 104 



Surface of ovicelled specimen. 



6. Steganoporella maqnilabris Busk, 1854 64 



Zooecia of the Pliocene species. 



7. Steganoporella breyis, new species 67 



The unilamellar type specimen, illustrating the short zooecium. 



8. Callopora ciirvirostris Hincks, 1861 32 



Portion of ovicelled zoarium. 



9. Stylopoma spongites Pallas, 1766 91 



Several zooecia and the characteristic ovicell. 



10. Hippodiplosia pertusa Ksper, 1794 106 



Zoarium with ovicelled zooecia. 



1 1 , 12. Dacryonella typica, new species 57 



Two zoarial surfaces. 



197 



