Acanthophoi'a\ ploride^ (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 Conceigao, frequently thrown up ; Dec. 1853 and Jan. 

 1854. No. 52. 



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. BOSTRYCHIA Mont. in Sagra Hist. Cuba, Paris, 1838-42, 39. 



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



Loanda. — On trunks of Bhizophora Mangle immersed at high water, 

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

 always broadly ceespitose, 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. aculeata KUtz. Phyc. Gen. p. 377. 



St. Vincent, Cape de Verde.— 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, Cat. Bot. iii. 106. 

 1. C. diaphanum Rt>th., I.e., p. 154. 



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

 1854. Nos. 67, and on 65. 



16. CENTROCERAS KUtz. in Linnjea, 1841, 741. 



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



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

 Concei9ao ; 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 algte, 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. 



Princes Island. — On rocks in the Atlantic, here and there, grow- 

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



