Pohjsoa from the Gllhert Islands. 419 



Fig. 4. — Steganoporella porteri. x 25. 



5. — ,, minutn. x 25. 



6. — Cnl)i'ilina ijilhertensis. x 50. 



7. — Lepralia trispinosa. x 25. 7a x 50. 



8. — Hiaiitopora corniculata. x 25. 



9. — ,, corrugata. x 25. 



10. — MicToporella irregularis. x 25. 

 11.^ — ,, falcifera. x 25. 



1 2. — Sehizoporella ensifera. x 36. 

 13. — ,, petlata. x 25. 



14. — ,, nitida. x 25. 



15. — ,, granulata. x 25. 



16.— „ perifera. x 25. 



17. — ,, perarmata. x 25. 



18. — Pollaploeciuni gilbertensis. x 12. 18a x 36. 

 19. — Mucronella umbonata. x 25. 

 20. — ,, rugata. x 25. 



21. — Cellepora crenulata. x 25. 



APPENDIX. 



Change of 7iame of ne2V species of Polyzoa ( Idmonea fasciculata). 



The name " aiigustaia " given to a species of Id>/io>iea described 

 by tiie in Part X. of " Further descriptions of the Tertiary 

 Polyzoa of Victoria," on page 234, vol. xxi. (new series), pt. i., is, 

 I find, preoccupied ; I therefore substitute for it the name 

 ^\fasdcu/ata." 



Line 21, page 234, shoukl read "-Idmonea fasciculata, n.s. 

 (PI. VII., Fig. 6)." 



C. M. Maplestonk. 



29/12/08. 



3a 



