Iir THE LOWER TEETIART S TRA-TA OF JfEW ZEA.LA.]^rD. 257 



Figs. 8, 9, 10. Different forms of acuate spicules. Fig. 8 X 50 ; fig. 9 X 200 ; 



fig. 10 X 100. 

 Fig. 10 a. Nearly cylindrical, abruptly pointed, acuate. X 100. 

 Figs. 11, 12. Smooth acuate spicules oi Myxilla'i X 100. 



13, 14. Smooth curved acuate spicules. Fig. 13 X 100; fig. 14 X 200. 

 Fig. 15. Slender elongate acuate. X 200. 

 Figs. 16-20. Smooth comma-shaped acuates of Axinella'i Fig. 16 X 100; 



figs. 17, 20 X 50 ; figs. 18, 19 X 200. 

 Fig. 21. Spined acuate spicule. X 200. 

 Figs. 22, 23. Straight fusiform acuates. X 100. 

 Fig. 24. Acuate spicule with spined head. X 100. 



25. Spined straight acuate. X 100. 

 Figs. 26, 33. Curved spined acuates. X 200. 

 Fig. 27. Strongly spined acuate spicule. X 200. 



28. Curved acuate with inflated summit. X 200. 



29. Upper portion of spinulate spicule with knobbed summit. X 200. 



30. Acuate spicule with curved summit. X 200. 

 Figs. 30 a, 31. Spined acuate spicules. X 200. 



Fig. 32. Almond-shaped spicule. X 200. 



34. Spined acuate spicule. X 200. 

 Figs. 35, 36. Elongate spined acuate spicules. X 100. 



37, 37 a, 38. Spined pin-like spicules of Hymeraphia ? Figs. 37, 38 

 X 300 ; fig. 37 « X 600. 



39, 40. Smooth acuates with bulbous shafts. X 100. 

 Fig. 41. Smooth curved acuate. X 200. 



Plate IX. 



Fig. 1. Smooth pin-shaped spicule. X 100. 



2. Pin-like spicule of Suberites (a). X 200. 



3. Smooth pin-like spicule. X 50. 



4. Pin-like spicule with spined head. X 200. 



5. Pin-like, with strongly spined head. Cribrella (a). X 200. 



Figs. 6, 7, 8. Smooth pin-hke spicules of Spirastrella? Figs. 6, 8 X 100 ; 

 fig. 7 X 50. 

 9, 10, 11. Curved pin-like spicules. Figs. 9, 10 X 200 ; fig. U X 100. 

 Fig. 12. Fusiform pin-like spicule of Proteleia (?). X 200. 



13. Grapnel spicule of Acarnus, Gray. X 200. 



14. Smooth pin-like spicule. X 100. 



Figs. 15-18. Nail-shaped spinulates of Hymeraphia (?). X 200. 



Fig. 19. Small, smooth, pin-like spicule. X 200. 



Figs. 20, 21. Forceps flesh-spicules of Forccpia Carteri. Fig. 20 X 600 ; 



fig. 21 X 300, 

 Fig. 22. Forceps flesh -spicule of Force]pia Fosmaeri. X 600. 

 Figs. 23, 24. Tricurvate spicules of Ainphilectus (?). Fig. 23 X 200 ; fig. 24 

 X300. 

 25-29. Hook-shaped flesh-spicules of Esperella and other genera. Fig. 25 

 X 300 ; figs. 26-29 X 200. 

 Fig. 30. Hook-shaped spicule of Cladorhi~a (?). X 200. 



LINN. .TOUEN. — ZOOLOGY, VOL. XXIT. 18 



