PLATE XXII. 



FIG. 



1. — Haliomma, shewing traces of tlie Sarcode. 

 2. — Haliomma, with strong thorny spines. 

 3. — Eucp-ticlium, with shell much thickened. 



4. — Tlie inside portion of Ehrenberg's Stephanastrum rhombus, with 

 the investing web, and the edge or border broken aw^ay, or be- 

 come obsolete. Many examples of this in Mr. Mansfield Browne's 

 Barbados slides. 



5 & 6. — Varieties of Rhabdolithes spectrum of Ehrenberg. 



7. — Probably an arm of a Stephanastrum. 



8. — An elongated variety of Eucyi'tidium tubulus, or Eucyrtidium 

 elegans of Ehrenberg. 



