714 
CAMBRIAN ORGANIC REMAINS FROM THE WEDDELL SEA. 
Fig. 61. G.fultus. Section below that of last figure, a, c, rooting processes; p, boundary between two 
of these processes; t, tabula. (Slide S. 152, x 9.) 
Fig. 62. G. fultus. Longitudinal section of outer wall. The porous structure of the latter is prominent 
in places, p, p, boundaries between rooting offsets; t, tabula. (Slide S, 154, x 9.) 
Fig. 63. Archxocyathus pauciseptatus. Transverse section of cup. At p the septa are seen to be 
porous. (Slide S. 145, x 9.) 
Fig. 64. A. pauciseptatus. Longitudinal section. Imperforate outer lamina is clearly seen on each side. 
р, septal pore ; i.w., porous inner wall ; c.t., coralloidal tissue in central cavity. (Slide S. 148, x 9.) 
Fig. 65. Protopharetra polymorpha. Transverse section of cup. (Slide S. 33a (1), x 9.) 
Fig. 66. P. polymorpha, Longitudinal section. Central portion at d is shown in PI. Ill, fig. 36. 
(SlideS. 2, x 3-5.) 
Fig. 67. Dictyocyathus sp. Transverse section illustrating very irregular rod-like septa. (Slide S. 54, 
x 11.) 
Fig. 68. Metaldetes plicatus. Transverse section through rather irregular cup which is attached to a 
portion of Spirocyathus atlanticus along the top. (Slide S. 49, x 3.) 
Fig. 69. M. plicatus. Longitudinal section showing septa, which are porous, crossed by a very irregular 
set of curving tabulae, w.p., pores on outer wall. (Slide S. 90, x 9.) 
Fig. 70. M. plicatus. More highly magnified figure of pores on outer wall, shown as w.p. in last figure. 
(Slide S. 90, x 27.) 
Fig. 71. M. plicatus. Longitudinal section of a septum to illustrate the porous character, a, h, septum 
with pores. (Slide S. 94, x 9.) 
Plate VII. 
Fig. 72. Protopharetra radiata. Transverse section near point of bifurcation of a cup. a, one cup 
cut near the top, inner wall developed and little tissue in central cavity; h, cup cut lower down than in a. 
Inner wall not so clearly visible, and centre filled in by coralloidal growths. (Slide S. 65, x 5.) 
Fig. 73. P. radiata. Transverse section above that of fig. 72. The section passes above the level of 
cup a; h is cut at a higher level than in the last figure, and a third cup c, with rooting processes 
r, is now joined to b. (Slide S. 66, x 5.) 
Fig. 74. P. radiata. Transverse section above level of fig. 73. The cup 6 has now disappeared, while 
с, with its rooting offsets d and e, has reached a level where the inner cavity is nearly free from 
infilling material and thus the inner wall is prominent. (Slide S. 67, X 5.) 
Fig. 75. Metaldetes plicatus. Transverse section at a low level, a, rooting process. (Slide S. 52, x 9.) 
Fig. 76. M. plicatus. Section of the same cup at a higher level. (Slide S. 53, x 9.) 
Fig. 77. M. plicatus. Section above that of fig. 76. Metaldetes form now well developed, a , new cup 
forming from the wall of the older cup. (Slide S. 54, x 9.) 
Fig. 78. M. plicatus. Topmost section of cup. a, the new cup at a higher level than in last figure, and 
having the Protopharetra form of the early stage (fig. 75) of the present cup. (Slide S. 55, x 9.) 
