Acanthophcn'a\ floride^ (Barton). 327 



11. ACANTHOPHORA Lam. in Ann. Mus. Hist. Nat. Paris, 

 XX. 132, 1813. 



1. A. Thierii Lam., I.e. 



LoANDA.— On shells near the shore of the island Loanda and Ilha 

 dos Passeros ; Jan. and April 1854. No. 112. Loanda ; Oct. 1853. 

 No. 113. On oyster-shells near Cabo Lombo ; 28 Nov. 1853. No. 114. 



12. POLYSIPHONIA Grev. Flora Edin. 308. 



1. P. elongata Harv. in Hook. Brit. Flora p. 333. 



Loanda. — On rocks on the Atlantic shores of Loanda near Fort S. 

 Pedro and Concei9ao, frequently thrown up ; Dec. 1853 and Jan. 

 1854. No. 62. 



2. P. pennata J. Ag. Alg. Med. p. 141. 



Loanda. — On rocks of the Loanda shore near Fort S. Pedro ; Feb. 

 1854. Penedo, July 1854. No. 96. 



13. BOSTRYCHIAMont.in SagraHist. Cuba,Paris, 1838-42, 39. 



1. B. tenella J. Ag. 8p. Alg. vol. ii. pt. 3, p. 369. 



Loanda. — Od trunks of Rhizophora j\fangle immersed at high water, 

 near Cabo Lombo, on the shores of Loanda, occurring rarely, but 

 always broadly csespitose, covering the trunks exactly like a Hypnum ; 

 29 Nov. 1853. Nos. 59, 60. 



14. SPYRIDIA Harv. in Hook. Br. Fl. ii. pt. i. 1833, 336. 



1. S. aciileata Kiitz. Phyc. Gen. p. 377. 



St. Vincent, Cape de Vekde.— 22 Aug. 1853. No. 217- 



2. S. clavata Kiitz. in Linn. 1841, p. 744. 



Loanda. — On the shore, thrown up by the ocean ; this one specimen 

 near Fort de Conceigao ; Jan. 1854. No. 58- 



15. CERAMIUM Roth, Oat. Bot. iii. 106. 

 1. C. diaphanum Eoth., I.e., p. 154. 



Loanda. — Morro das Lagostas, on a species of Hypnea, etc.; Jan. 

 1854. Nos. 67, and on 65. 



16. CENTROCERAS Kutz. in Linnsea, 1841, 741. 



1. C. elavulatum Mont. Fl. Alg. p. 140. 



Loanda. — On rooks covered by sand on the shore near Fort de 

 Conceifao ; Dec. 1853. No. 61. Near S. Pedro ; Feb. and April 1854. 

 No. 64. On rocks of the sea near Morro das Lagostas and S. Pedro, 

 frequent ; Jan. 1854. No. 66. 



17. PEYSSONELIA Dene. PI. Arab. 168. 

 1. P. rubra J. Ag. Sp. Alg. ii. p. 502. 



Loanda. — On rocks and various algse, Praia de Penedo ; Jan. and 

 Feb. 1854. No. 121. 



Island of Loanda. — May 1854. No. 123. 



St. Vincent, Cape de Verde. — On rocks and various algae near 

 volcanic rocks, but rarely well developed ; 22 Aug. 1853. No. 233. 



Prince's Island. — On rocks in the Atlantic, here and there, grow- 

 ing gregariously ; 21 Sept. 1853. No. 256- 



