PLATE II. 



FIG. 



1. — Stylodictja yracilis. Ehrenberg. 



2.— A Dictyospiris (?) of Elirenberg, highly developed in slide Zjf 

 Cambridge, Barbados. 



3. — Dictyospiris (?) or perhaps Petalospiris (?) May they not possibly 

 be the same organisms in ditterent states of development ? 

 Ceratospiris, (Mikrogeologie, PI. XXTT, fig. 37,) also resembles 

 these shapes which occur in great variety in the Barbados 

 deposits. 



4. — Rhabdolithes pipa. spined stem var. Ehrenberg places Rhabdo- 

 litlies in the family of Geolithen. 



5. — Stephanolithes nodosa. ; also a Geolithen of Ehrenberg. 



6. — Acanthodesmia of J. Miiller (INIittelmeeres, p. 30) Stephanolithes 

 spinescens (?) of Ehrenberg. It occurs in double and single 

 circlets, and witli \arj-iug number of spines in the Barbados 

 deposits. 



