PLATE XIV. 



FIG. 



1. — Astromma (?) A rhomboidal shaped mass of a very confused 

 sponge-like web of fine tangled threads ; inclosing in the middle 

 a dark areolated ball. Four sharp spines protrude from the 

 web at right angles, and measure from point to point •01714. 



2, 3, 4. — Varieties of Astromma Aristoteles (?) 



5. — A more complete specimen of Rhopalastriun lagenosum. Mik. 

 PL XXII, fig. 22. 



6.- Central part of a similar organism. These beautiful crosses, with. 

 and without balls or spuies at the ends of the arms, are very 

 frequent in the deposit from Mt. IliUaby, Barbados. For the 

 selected slides of that material from which the figm-es m this 

 and the following plate are chiefly drawn, I am indebted to 

 Geo Mansfield Browne Esq. 



