DESCRIPTION OF PLATES. 159 



PLATE VI. 



1. Amphiblesti'um carle use. ^.iiTir\To7>\ 



2. ^:/w^;//i6Z^s^;vfm c</^/w/r//br;«*s, natural size and magnitied. /^' ,,i. /j 



3. Amphiblestr 11)11 aniinlns. ^"r'tfcMi3\.'-'*>' 



4. Farcimla lusoria. 



5. Farcimla artlculuta. 



6. Farcimia oculata. 



7. Farcimla oculata. 



8. Caleschara dentlculata, specimen showing the lateral fissures and cross-bar. 



9. Caleschara denticulata, natural size, 9« group of zooecia with the central portion 



and cross-bar worn away. 



10. Thalamoporella rozieri. 



11. Thalamoporella lata. 



12. 2Iemhranipora amhUjna. 



13. Memhranlpora bkleiis. 



14. Steganoporella magiiilahris, natural size, 14a anterior view of group of zooecia 



magnified 146, posterior view of two zoa?cia. 



15. Steganoporella magiMabris. 



16. Steganoporella magullabris. 



17. Steganoporella depressa. 



18. Steganoporella lateralis. 



19. Steganoporella pat (da, natural size, 19a portion magnified. 



20. Steganoporella patida, portion of another specimen shewing ocecium and 



avicularia. 



PLATE VII. 



1. LunuUtes paroicella, natural size, la portion of anterior surface magnified, lb 



dorsal surface. 



2. LunuUtes parvicella, specimen sheAving the two forms of vibracular cells. 



3. Lunulites canalicidala, anterior and dorsal view. 



4. Lunalites rtdella, natural size, 4« anterior surface, 46 dorsal view. 



5. Selenaria maculata, natural size. 



6. Selenaria maculata, portion of a specimen shewing zocecia and vibracular cells, 



6« posterior view of same. 



7. Selenaria maculata, group of zooecia from another specimen, 7a dorsal view of 



part of same. 



8. Selenaria punctata, natural size, 8a part of anterior surface, Sb dorsal view. 



9. Selenaria punctata, 2)art of another specimen to shew vibracular cell. 

 10. Selenaria squamosa, anterior view of young specimen magnified. 



