120 THE VOYAGE OF H.M.S. CHALLENGER. 



Generally diffused in tropical -and subtropical seas, and extending into the south 

 temperate zone. 



Centroceras cryptacanthum, Kiitz. 



Centroceras cryptacanthum, Kiitz. in Linnaea, 1842, p. 741, et Sp. Alg., p. 688 ; Dickie in Journ. Linn. 

 Soc. Lond., xiv. p. 315. 



Bermudas. — Shallow water — Moseley. 



West Indies ; Cape Verde Islands ; Brazil ; Falkland Islands ; Valparaiso. 



Ceramium nitens, J. G. Agardh. 



Ceramium nitens, J. G. Agardh, Sp. Alg., ii. p. 130; Harv., Nereis Bor.-Am., ii. p. 213; Rein in 

 Bericht Senckenb. Naturf. Gesellsch., Frankf. am M., 1873, p. 152. 



Bermudas. Rein. 

 Florida Keys ; West Indies. 



Ceramium rubrum, J. G. Agardh. 



Ceramium rubrum, J. G. Agardh, Sp. Alg., ii. p. 127; Harv., Nereis Bor.-Am., ii. p. 213; Kemp in 

 Canad. Nat. and Geo]., May 1857. 



Bermudas. Kemp. 



A very widely dispersed species, including the eastern coast of North America from 

 the Arctic Sea to South Carolina. 



Ceramium fastigiatum, Harv. 



Ceramium fastigiatum, Harv., Phyc. Brit., t. 255, et Nereis Bor.-Am., ii. p. 217 ; Kemp in Canad. 

 Nat. and Geol., May 1857. 



Bermudas. Kemp. 



Baltic ; Adriatic ; Mediterranean ; North Atlantic, though not recorded from the 

 coast of the Southern States of North America. 



CHLOROSPERME.E. 

 SlPHONACE^E. 



Caulerpa mexicana, Sonder. 



Caulerpa mexicana, Sonder, ex Kiitz., Sp. Alg., p. 496; Harv., Nereis Bor.-Am., iii. p. 16, t. 37, A. ; 

 Dickie in Journ. Linn. Soc. Lond., xiv. p. 315. 



Bermudas. — From shallows, and also dredged from thirty-one fathoms ; specimens 

 from this depth well developed and of the usual colour — Moseley ; Rein. 



Florida Keys ; West Indies ; Mexico ; Fernando-Noronha ; Cape Verde Islands ; 

 Ceylon. 



