— 195 — 
36. D. divaricata J. Ag. Alg. Syst. V. p. 101; De Toni Syll. III. p. 276. — 
D. Barteyresiana var. 8 divaricata J. Ag. Spec. I p. 94. — D. acutiloba 
Kg. Tab. phye. IX. t. 29 non J. Ag. 
The specimens are sterile but correspond in all other characters 
with this species. (They also agree in some manner with Dictyota indica 
Sond. Kg. Tab. phyc. IX. t. 17, a species insufficiently fixed which is 
cited from Siam by v. Martens). 
Koh Chang-Strait at Lem Ngob, cast ashore. 
Area: Atlantic; Red Sea. 
37. D. sp. 
Only a single sterile and incomplete specimen; perhaps D. robusta 
J. Ag. Anal. alg. C. I. p. 76. (Australia). 
Koh Kahdat, in 1—2 fathoms water (coral-sand). 
Haliseris Targ-Tozz. 
38. H. polypodioides (Desf.) Ag. Spec. I. p.142; De Toni Syll. IIL p. 254. 
— Dictyopteris polypodioides Lamx. — Fucus polypodioides Desf. Flor. 
atl. IL p. 421. 
Between Koh Mesan and Cape Liant, in 9 fathoms water. 
Area: Mediterranean; Warm Atlantic; Cape; Red Sea;  Pacitic. 
(Australia, Japan). 
Padina Adans. 
39. P. Commersonii Bory Voy. Cog. Nr. 41, t. 21; d. Ag. Alg. 
Syst. V. p. 119; De Toni Syll. UL p. 244. 
Among the present great number of specimens some are provided 
with oospores and belong surely, I think, to this species, but it is 
probable, that among the sterile plants there may be specimens of the 
widely distributed Padina pavonia. 
Koh Kahdat, in 1—2 fathoms water (coral-sand). 
Area: W. Indies; Red Sea; Tropic. Australia; Ceylon; N. Guinea; Japan. 
Zonaria (Gymnosorus) J. Ag. 
40. I. sp. 
Decumbent little crustaceous patches attached to stones and one little 
unattached sterile specimen. All show the structure of Zonaria (Gymno- 
sorus). Judging by their mode of growth the specimens probably represent 
young states of Zonaria Diesingiana J. Ag. or Zonaria (Gymnosorus) 
variegata (Lamx.), which both occur in the Pacific. (Or should our plant 
perhaps be identical with Zonaria obscura Dick., a doubtful species 
shortly described in Dickie, Alg. Mangaia Isl. in Journ. Linn. Soc. 1875, p.31?). 
