1900.] MARINE FAUNA OF CHRISTMAS ISLAND. 141 



Y. List of the Foraminifera from the Boat-channel, Flying Fish 

 Cove, Christmas Island, 11 fathoms. By F. C. Chapman, 

 A.L.S., F.B.M.S. 



1. Biloculina ringens (Lamarck). Very rare. 



2. Spirolocidina fragilissima Brady. Very rare. 



3. Miliolina oblonga (Montagu). Very rare. 



4. „ seminulum (L.) Frequent ; small. 



5. „ auberiana (d'Orb). Rare ; rather small. 



6. „ parkeri Brady. Very rare. 



7. ,, bicomis (Walker & Jacob). Very rare. 



8. ,, rupertiana Brady. Frequent ; very fine. 



9. „ insignis Brady. Very rare. 



10. Hauerina ornatissima (Karrer). Bare. 



11. Orbitolites complanata Lamarck. Frequent. 



12. ,, marginalis (Lam.). Very rare. 



13. ,, duplex Carpenter. Rare. 



14. Textularia ragosa (Beuss). Bare. 



15. Bolivina limbata Brady. Very common. 



16. Spirillina limbata Brady. Bare. 



17. Truncatulina rostrata Brady. Common. 



18. „ ungeriana (d'Orb.). Very rare ; small. 



19. Pidvinulina repanda (Fichtel & Moll). Common. 



20. Galcarina hispida Brady. Very rare. 



21. Oypsina vesicidaris (Parker & Jones). Bare. 



22. Polytrema miniaceum (Pallas). Common. 



23. Polystomella macella (Fichtel & Moll). Bare. 



24. Heterostegina depressa d'Orb. Common. 



VI. EXPLANATION OF THE PLATES. 

 Plate XII. — Sponges from Christmas Island. 



Fig. 1. Tethya affinis (p. 133), nat. size. 



2. Psev.dosuberites andrewsi (p. 135), nat. size. 2 a. oscule, X 30 ; 2 b, section, 



X 30. 



3. Microciona, dubia (p. 136), nat. size. 3«, section, X 10. 



4. Stylofella irregularis (p. 137), nat. size. 



5. Rhizuchalina sessilis (p. 138), nat. size. 



6. Reniera innominata. (p. 138), nat. size. 6 a, section, X 30. 



7. Petrosia exigua (p. 139), nat. size. 



Plate XIII. — Sponges from Christmas Island. 



Fig. 1. lotrochota baculifera tutnescens (p. 136), strongyles X 300. 



2. Microciona dubia (p. 136); a-d X 300; e-f X 1600. a, thick sub- 



tylote ; b, spined style; c, slender tylote ; d, large toxon ; e, pal- 

 mate isochela, side view ; e', ditto, front view ; f, short toxon. 



3. Tethya affinis (p. 133). «, strongyloxeum, X 80 ; b, spheraster, X 400; 



c, somal chiaster, X 4U0 ; d, dermal chiaster, X 40U. 



4. Petrosia exigua (p. 139), oxeum, X 300. 



5. Reniera innominata (p. 138). a, strongyle, x300 ; b, oxeum x 300. 



6. Stylotella irregularis (p. 137); a-d, x300. a, oxeum ; b, style ; c, stron- 



gyle ; d, slender oxeum. 



7. Pseudosube rites andrewsi (p. 135) ; tylote, X 300. 



8. Rhicochalina sessilis (p. 138), oxeum, X 150. 



