— 199 — 



The specimens show the structure and the other characteristic points 

 of Gracilaria dura, a species much varying in its habit; but I think 

 our plant represents a very distinct form , which should be fixed. In 

 general, prolifications occur rarely in the genus Gracilaria. 



The specimens , provided with cystocarps , are somewhat stout and 

 robust, about 10 cm. high and about 1—1 V2 mm. thick (in diameter). 



Koh Chang-Strait, in shallow water near Lem Ngob. 



Hypnea Lamx. 



47. H. musciformis (Wulf.) Lamx. Ess. p. 43 ; De Toni Syll. IV. p. 472. — 

 Fucus musciformis Wulf, in Jacq. Coll. III. p. 154, t. 14. Fig. 3. 



A small but fruiting (tetrasp.) specimen. 



Koh Chang-Strait at «Lern Ngob, in sandy ground between tide-marks. 

 Area: In all warm Seas. 



Champia Desv. 



48. Ch. parvula (Ag.) J. Ag. Epic. p. 303; De Toni IV. p. 558. — 

 Lomentaria parvula Gaill. — Chylocladia parvula Hook. — - Chondria 

 parvula Ag. Syst. p. 207. 



The (sterile) specimen agrees in its habit with Lomentaria parvula 

 ß. vaga Kg. Tab. phyc. XV. t. 87. 



4 miles S. of Koh Saket, in 0 fathoms water (shells). 

 Area: Mediterranean; Atlantic; Australia; Japan. 



Caloglossa (Harv.) J. Ag. 



49. C. miiioides Harv. Alg. exsicc. Friendl. Isl. Nr. 33; J. Ag. Epic, 

 p. 500; De Toni Syll. IV. p. 729. — Hypoglossum Vieillardi Kg. Tab. 

 phyc. XVI. t. 10. 



Very young specimens only, therefore somewhat doubtful as to species. 

 15 miles E. of Koh Chuen, in 10 fathoms water (shells.). 

 Area: N. Guinea; N. Caledonia; Friendl. Islds. ; Ceylon. '? 



Laurenoia Lamx. 



50. L. divaricata J. Ag. Spec. II. p. 754. 

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

 Area: Red Sea; Indian and Pacific Oceans. 



51. L. deiidroidea J. Ag. Spec. II. p. 753. 

 Koh Kahdat, cast ashore. 



Area: Warm Atlantic; Pacific (Australia, Japan). 



