40 CLASS L~ORDER I, 



very distinct globular cells, that have an oblique 

 opening. 

 Found situated as the preceding. 



EING. 



12. Celleporx annularis. Cells oval, and slightly 

 projecting, forming parallel rings round the stems of 

 the thalassiophytes : opening surrounded by some glo- 

 bular tubercles. 



On the Gelidium concatenatum of the French coasts. 



POUNCE. 



13. Cellfpora pumicosa. Rough to the touch, and 

 fragile. Cells globular, with a thorn at the border of 

 their openings. 



Variety. Almost without a thorn. In the Euro- 

 pean seas. Variety from the Cape of Good Hope. 

 On Thalassiophytes. 



CRIMSON. 



14. Crllepora coccinea. Cells urceolated, and 

 punctured ; opening with a single short tooth, placed 

 on the upper part. 



On the coast of Heligoland. 



CALIX. 



15. Cellepora caliciformis. Cells nearly oval, with 

 a rugged surface ; opening large at the top of each 

 cell, and garnished with several teeth. 



On the Thalassiophytes of the bay of Cadiz. 



