IN THE LOWER TEKTIART STRATA OF NE"W ZEALAND. 259 



Pigs. 36, 41. Equianchorate flesh-spicules of Desmacidon (b). X 300. 



Fig. 37. Equianchorate (?) spicule of Chondrocladia (e). X 300. 



Figs. 38, 39. Front and side views of equianchorate spicules of Desmacidon (c). 



X 300. 

 Fig. 40. Side view of equianchorate spicule of HalicJiondria (a). X 300. 

 Figs. 42, 43. Side views of equianchorate spicules of Halichondria (b).' X 600. 

 Fig. 44. Bipocillate (?) flesh-spicule oilophon hyhridus. X 600. 



45. Spined equianchorate spicule. X 300. Side view. 

 Figs. 46, 47. Side views of equianchorate flesh-spicules of Myxilla (d). Fig, 46 



X 300 ; fig. 47 X 600. 

 Fig. 48. Front view of equianchorate spicule of Myxilla (h). X 600. 

 Figs. 49-62. Front and side views of equianchorate spicules of Myxilla Bendyi. 



X 600. 



Plate XI. 

 Figs. 1, 2, 3. Anchorate flesh-spicules of Guitarra Carteri. x 200. — Fig. 1 is a 

 front view showing transverse striae ; fig. 2 shows the axial canal 

 extending from one tubercle to the other ; fig. 3 shows the outlines 

 of the spicular shaft. 

 4-7. Anchorate flesh-spicules of Guitarra intermedia. — Fig. 4 is a specimen 

 in which the front palms are absent, X 200. Fig. 5 is an oblique 

 view showing the anterior palms ; fig. 6 is a side view, X 200 ; fig. 7 

 is a side view of a much smaller specimen in which there are indi- 

 cations of canals in the anterior palms, X 600. 

 8, 9. Equianchorate spicules of Pseudohalichondria deformis. X 600. 

 Fig. 10. Eqm&nchora,te STpicule o{ Pseudohalichondria (a,). X 600. 

 Figs. 11, 14. Spined anchorate spicules of Pseudohalichondria (b). X 600. 

 Side view. 

 12, 13. Oblique and side views of equianchorate spicules of Pseudohali- 

 chondria Oamaruensis. X 600. 

 Fig. 15. Sceptrella flesh-spicule of Latrunculia (a). X 300. 



16. Sceptrella spicule of Latruncidia (b). X 300. 

 Figs. 17-23. Difierent forms of sceptrella spicules of Latrunculia (c), (d), (e), 

 (f), (g), (h), (i). Figs. 17, 21, 22. 23 X 300; figs. 18, 19, 20 x600. 

 24-28. Diiferent forms of sceptrella flesh-spicules of Latrunculia (o), (p), 



(q), (r). Figs. 24-27 X 600; fig. 28 x 300. 

 29, 30, 31. Modified sceptrella spicules of Latrunculia (s). x 600. 

 Fig. 32. Sceptrella spicule of Latruncidia obtusa. X 300. 



33. Sceptrella flesh-spicule of Latrunculia (t). X 600. 

 Figs. 34, 35. Elongate sceptrella spicules of Latrunculia Oamaruensis. X 300. 

 36-39. Diiferent forms of sceptrella spicules of Latrunculia (k), (1), (m), 

 (n). X 300. 

 Fig. 40. One of the whorls of a sceptrella, seen from above, showing the shaft 



and axial canal in section. X 600. 

 Figs. 41, 42. Nodose flesh-spicules of Thoosa Hancocki. x 600. 

 Fig. 43. Kodose flesh-spicule of Thoosa Hancocki (?). X 600. 



44. Sceptrelliform flesh-spicule of Alectona. X 600. 



45. Modified sceptrella of Latrunculia (u). X 600. 



