PLATE XVI. 



PAGE 



Holascus fihulatus, F. E. S., . . . 87 



Fig. 1. Superior portion of a defective specimen preserved in alcohol ; natural 

 size. 



Fig. 2. Section at right angles through the lateral wall of the specimen shown 

 in fig. 1 (combination figure) ; x 30. 



Figs. 3, 4. Triacts with bent rays, from the trabecular framework ; x 450. 



Figs. 5-7. Fibulge from the trabecular framework ; x 450. 



Fig. 8. Part of a principal hexact with small comital diacts, from the terminal 

 sieve-plate ; x 50. 



Fig. 9. A macerated specimen ; natural size. 



Fig. 10. Terminal sieve-plate of the specimen shown in fig. 9 ; natural size. 



Fig. 11. Inferior portion of an anchor-like diact from the basal tuft of the 

 specimen, shown in fig. 9 ; x 100. 



Fig. 12. Middle part of an oxydiact from the inferior portion of the wall of 

 the specimen shown in fig. 9 ; x 100. 



Fig. 13. Inferior portion of an anchor-like diact from the basal tuft of the 

 specimen shown in fig. 9 ; x 100. 



