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



Sargassum polycystum, Agardh ? 



Sargassum polycystum, Agardh; J. Agardh, Sp. Alg., i. p. 310? Dickie in Journ. Linn. Soc. Lond., 

 xv. p. 23$. 



Admiralty Islands. — On the coast of Cochin-China, Singapore, and Java. 



Cystophyllum muricatum, Agardh. 



Cystophyttum muricatum, Agardh; J. Agardh, Sp. Alg., i. p. 231; Harv., Phycol. Austr., v. p. 8 ; 

 Dickie in Journ. Linn. Soc. Lond., xv. p. 238. 



Admiralty Islands. — Australia and Indian Archipelago. 



Turbinaria vulgaris, J. Agardh. 



Turbinaria vulgaris, J. Agardh, Sp. Alg., i. p. 267 (varietates plures) ; Dickie in Journ. Linn. Soc. 

 Lond., xv. p. 238. 



Admiralty Islands. — This is found in the warmer parts of all the great seas ; and it 

 was collected by Mr Moseley at the Arrou, Philippine, Society, and Sandwich Islands. 



Padina pavonia, Linn. 



Padina pavonia, Linn. ; J. Agardh, Sp. Alg., i. p. 113;*Dickie in Journ. Linn. Soc. Lond., xv. p. 238. 



Admiralty Islands. — Generally diffused in tropical and temperate seas. 

 Dictyota dichotoma, Lamour. 



Dictyota dichoioma, Lamour. ; J. Agardh, Sp. Alg., i. p. 92 ; Harv., Phycol. Austr., v. p. 12 ; Dickie 

 in Journ. Linn. Soc. Lond., xv. p. 238. 



Admiralty Islands. — Common in both north and south temperate seas ; rarer within 

 the tropics. 



Ectocarpus sordidus, Harv. ? 



Ectocarpus sordidus, Harv. in Hook. f. El. Tasm., ii. p. 294? Dickie in Journ. Linn. Soc. Lond., 

 xv. p. 238. 



Admiralty Islands. ■ — The original was from the shores of Tasmania, and we have 

 seen no other specimens. 



Sphacelaria furcigera, Kiitz. 



Sjphaci laria furcigcra, Kiitz. ; Dickie in Journ. Linn. Soc. Lond., xv. p. 238. 



Admiralty Islands.— Also collected by Mr Moseley at the Sandwich Islands. 



