164 PLATE LXIT.I. 



Fig. 9. — A specimen from Strangford Lough, Ireland, 

 sent to me by Prof. Dickie. Natural size. 



Fig. 10. — A full-sized skeleton spiculum. X 250 

 linear. 



Fig. 11. — A tension spiculum from tlie dermal 

 membrane, x 250 linear. 



Fig. 12. — One of tte contort, bibamate, retentive 

 spicula from tbe dermal membrane. X 530 linear. 



Fig. 13. — A reversed, bihamate, retentive spiculum 

 from tbe dermal membrane, X 530 linear. 



Fig. 14. — A dentato-palmate, inequi-ancborate, re- 

 tentive spiculum from the dermal membrane. X 630 

 linear. 



In vol. i, Plate XIII, figure 264, there is a fibre of the 

 skeleton of this species represented. X 108 linear. 



