— 200 — 
52. L. obtusa (Huds.) Lamx. Ess. p. 42; J. Ag. Epic. p. 653. — 
Fucus obtusus Huds. flor. angl. p. 586. 
Some of the present specimens agree tolerably with var. squarrulosa 
Grun. Alg. Fidji-Samoa Islds. p. 23. (from Tongatabu). 
Koh Chang-Strait at Lem Ngob, on rocks between tide-marks. 
Area: Widely distributed in all warm Oceans. 
Acanthophora Lamx. 
53*, A. orientalis J. Ag. Spec. IL p. 820. 
The specimen from Lem Ngob is sterile, therefore doubtful, but I 
have seen some little fertile fraginents between Alge from Koh Kahdat 
which certainly belong to this species. 
Lem Ngob, Koh Kahdat in shallow water. 
Area: Manila; Samoa-Tonga-Marianes Isls.; (Siam? sub nomine A. Thieryi). 
Polysiphonia Grev. 
54. P.seopulorum Harv. Mar. Bot. W. Aust. Nr. 88; J. Ag. Spec. If. p. 940. 
On stones. 
Koh Chang Noi, on coral-reef in shallow water. 
Area: W. Australia. 
Tolypiocladia Schmitz. 
55. T. glomerulata (Ag.) Schm. in Engl. u. Prantl. Pfl. fam. p. 441, — 
Polysiphonia glomerulata (Ag.) J. Ag. Spec. Il. p. 1016. — Polysiphonia 
calodictyon Harv.; Polysiphonia calacantha Harv. — Hutchinsia glome- 
rulata Ag. Syst. p. 158. . 
Koh Kahdat, Koh Chang Noi, on coral-reefs in shallow water. 
Area: Indian and Pacific Oceans. 
Leveillea Dene. 
56. L. jungermannioides (Mart. et. Her.) Harv. Mar. Bot. W. Aust. 
p. 5389. — L. gracilis Dene. — Polyzonia jungermannioides (Mart. et. Her.) 
J. Ag. Spec. Il. p. 1169. — Amansia jungermannioides Mart. et Her. in 
Flora 1836 p. 485. 
Koh Chang Noi, Koh Lom, on coral-reefs in shallow water. 
Area: Red Sea; Indian and Pacifie Oceans. 
Ceramiaceae. 
Ceramium (Roth) Lgby. 
57, C. fastigiatum Harv. in Hook. Journ. Bot. p. 303; J. Ag. Epic. 
p. 96; Anal. alg. Cont. II. p. 16. 
