PLATE XCV. 



PAGE 



Hexactinella lata, F. E. S., . . . 329 



Fig. 1. Transverse section of the tube wall; x 15. 

 Fig. 2. Transverse section of the wall of a canal ; x 60. 

 Figs. 3, 4. Sphserohexacts with straight smooth rays ; x 450. 



For " Tretodictyum latum" on the Plate read "Hexactinella lata"; see note on 

 PI. XCTII. 



