17 



and softer and slender than those which are commonly collected along 

 the Pacific coast of the Main Island of this country. 



Rhizophyllidaceae. 

 Chondrococcus Kutz. 

 Chondroooccus ambiguus (Grev.) Schmitz.— Desmia ambigua (Grev.) 

 Harv.— J. Ag. Sp. II, p. 641, III, p. 357. 



Hitherto known from: The Indian Ocean at Ceylon ; New Hol- 



Squamarieae. 

 Peyssonelia Decsne. 

 Peyssondia rubra (GreV.) J. Ag. Sp. II, p. 502, III, p. 386.— 

 Hauck Meeresalg. p. 34, f. 7, d.e. 



Hitherto known from: The Mediterranean Sea; Fidschi Isl.; 

 Tonga Isl. ; N. and S. Australia ; Bourbon Isl. ; Formosa. 



Botanical Laboratory of the 4th Higher School, 

 Kaga, Japan, Nov. 10, 1896. 



EXPLANATION OF FIGURES IN PLATE I. 



Caulerpa subserrata Okam. 

 Fig. J. A frond in nat. size. 

 Fig. 2. The same, 35/1. 



Caulerpa ambigua Okam. 

 Fig. 3. A frond in nat. size. 



Fig. 4. A branchfpf the frond drawn in fig. 3, 30/1. 

 F|g. 5. Lower ^portion i of the same, xd.^ 



Fig. 9. A branch of the frond drawn in fig. 8, 50/1. 

 Fig. 10. The same, 85/1. 



Fig. 11. Lower portion of the same frond to show some irregularity in the arrangement 



of ramenta, 85/1. 

 Fig. 12. Boot of the same, 16/1. 



Caulerpa Okamurai Wtbft. 



Fig. 13. A frond in nat. size. 

 Fig. 14. Portion of the same, xd. 



