210 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 6 



Fig. 1. M embraniportdra porosa new species. 



Fig. 2. Alderina smiiti new name. 



Fig. 3. Alderina breif'tspina (O'Donoghue). 



Fig. 4. Callopora lineata {Linnaeus). 



Fig. 5. The same, showing ovicell and avicularium. 



Fig. 6. Callopora ivh'tteavesi Norman. 



Fig. 7. Callopora craticula {Alder) . 



Fig. 8. Callopora exilis {Hincks) . 



Fig. 9. Callopora horrida {Hincks). 



Fig. 10. Callopora armata O'Donoghue. 



