12 ART. 12. — K. YENDO. 



in distinguishing his two species. In the specimens which I have 

 referred to Äm,p. cretacea Endl., found commonly in north Japan, 

 the articuli with such characters occur frequently but not invari- 

 ably. Neither Areschoug nor Kützing gives anything about 

 the conceptacles of their plants, and I have not seen any au- 

 thentic specimens of these species. But the distinguishing charac- 

 ters mentioned by these authors are by no means fixed ones. 

 Their species, if worth mentioning separately, may be disposed as 

 above. 



Amp. nodularia Done., according to Areschoug, has close 

 affinity with Amp. hrevim^ticulata. It should be united with 

 Amp. cretacea or its forma. 



Gen. II. IVIETAGONIOLITHON W. v. B. 



Metagoniolithon Charoides W. v. B. Coral. Sib. Exjo. p. 84. 



= Amphiroa Charoides Lamx. Histoir. p. 301. 



= Amp. Chara Done. Classif. des Alg. p. 63. PL 17. fig. 9. 



= Corallina Galioides Lamk. Mem, Mus. II. p. 239. 



= Amp. steUulata Kütz. Spec. p. 702. 

 M. stelligerum A¥. v. B. Coral. Sib. Exp. p. 84. 



= Amp. stelligera Aresch. in J. Ag. Spec. Alg. II. p. 540. 



= Corallina stelligera Lamk. Mem. Mus. II. p. 239. 



= Amp. jubata Lamx. Histoir. p. 301. t. 11. fig. 6. 



= Amp. elegans Sond. Plant. Preiss. p. 55. no. 53. 



= Amp. verrucosa Lamx. Histoir. p. 300. PI. XI. fig. 4. 



= Amp. stelligera ß. interrupta Kütz. Tab. Phyc. VIII. p. 26, Taf. 

 52. fig. h. 



= Amp. interrupta Lamx, Histoir. p. 301. PI. XL fig. 5. A. 

 M. gracile f 



= Amp. gracile Harv. Phyc. Austr. PI. CCXXXI. 



= Amp. intermedia Harv. Syn. Catal. of Austr. and Tasm. Alg. 

 p. 30. 



SFECIES DOUBTFULL. 



Amphiroa granifera Harv. Syn. Catal, of Austr, and Tasm. Alg. p. 30. 

 = Metagoniolithon graniferum W. v. B. Coral. Sib. Exp. p. 84. 



