1- A Polycystinous nucleus, with one spine running through
it, and attached at each end to a plain circle of Silex. —(In shde B. VI. Cambridge, Barbados) Lithocircus,
Mesocena (?)
2- A similar nucleus with four Acanthometrum shaped
spines (see Miiller's Mittelmeeres, &c., PI. X.) attached
to it, the hooks of which describe part of a circle.
Actiniscus (?) in slide T. Cambridge, Barbado.i.
3- A Hyaline wand, spirally twisted.
4- Rhabdolithes Pipa. var. Ehrenberg.
