— 195 — 



36. D. divaricata J. Ag. Alg. Syst. V. p. 101 ; De Toni Syll. III. p. 276. — 

 D. Barteyresiana var. ß 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. !). sp. 



Only a single sterile and incomplete specimen; perhaps D. robusta 

 J. Ag. Anal. alg. G. I. p. 76. (Australia). 



Koh Kahdat, in 1 — 2 fathoms water (coral-sand). 



Haliseris Targ-Tozz. 



38. II. polypodioides (Desf.) Ag. Spec. I. p. 142 ; De Toni Syll. III. p. 254. 

 — Dictyopteris polypodioides Lamx. — Fucus polypodioides Desf. Flor, 

 atl. II. p. 421. 



Between Koh Mesan and Gape Liant, in 9 fathoms water. 

 Area: Mediterranean; Warm Atlantic; Cape; Red Sea; Pacific, 

 (Australia, Japan). 



Padina Adans. 



39. 1*. (online rso il i i Bory Voy. Goq. Nr. 41, t. 21; J. Ag. Alg. 

 Syst. V. p. 119; De Toni Syll. III. 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?). 



