PLATE XXII 



Genital tufts of gonodendra 



Figs, i, 2, 3 and 7. Early growth stages (cf. fig. 2 with Text-fig. 27 G). 



Fig. 1 x 36, fig. 2 x 70, fig. 3 x 76, fig. 7 x 65. 



Fig. 4. Terminal and sub-terminal sections of end-branchlets. x 60. 



Fig. 5. Middle stage of development of an end-branchlet (cf. Text- 

 fig. 27 G for an earlier stage of the same), x 55. 



Fig. 6. (In the 'key' stage of development) showing two branchlets 

 growing out sub-terminally from the large palpon. The smaller 

 one consists of only the usual two end sections, terminal and sub- 

 terminal ; the second itself bears a similar branchlet growing out 

 sub-terminally opposite its larger terminal palpon. The left-hand 

 part of this specimen was removed for the sake of clarity, x 40. 



Fig. 8. (Cf. with fig. 6) showing rapid growth of the terminal palpon, 

 on the tip of which can be seen a heavy armature of nematocysts. 

 Its jelly-polyp can be seen below the palpon. x 30. 



Fig. 9. A 'key' stage showing how a sub-terminal section buds from 

 a terminal one. x 79. 



Fig. 10. Showing a branchlet 'dividing' three times; three end sections 

 on the right, three on the left and numerous gonophores. The tips 

 of the palpons are heavily armed with nematocysts. The right side 

 is comparable with fig. 8. x 36. 



Fig. 11. Showing how complicated the genital tufts look when lying 

 side by side. Here two tufts, partially separated, have been 

 flattened in one plane on a microscopical slide, x 37. 



