10 ART. 12. — K. YENDO. 



Scet. IV. MARGINISPOB.UM Yendo. Enumer. Cor. Jap. p. 191. 



Amphiroa declinata Yendo. Cor. ver. Jap. p. 15. PI. I. %. 29 : PI. VI. 



ûg. 4. 

 A. crassissima Yendo. 1. c. p. 16. PI. I. %. 27-28 : PI. V. %. 5-6. 

 A. cretacea Ende. Mantissa. Suppl. III. p. 49. 



= CoraUina cretacea Post, et Rupr. Illustr. p. 20. t. 40. f. 104. 

 = Arthrocardia cretacea W. v. B. Coral. Sib. Exp. p. 105. 

 f. rosariformis Yendo. Cor. ver. Jap. p. 7. PI. IV. fig. 3. 

 f. capensis f 



= Amphiroa capensis Aresch. in J. Ag. Spec. Alg. II. p. 533. 

 = Amp. dubia Kütz. Tab. Phyc. VIII. p. 24. Tab. 49. fig. 1. 

 Yar. tasmanica Kütz. Tab. Phyc. VIII. p. 23. Tab. 47. fig. 2. 

 = Amp. tasmanica Sond. Plant. Müll. p. 686. 

 f. breviarticulata. f 

 = Ajup. breviarticulata Aresch. in J. Ag. Spec. Alg. IL p. 532. 



SPECIES DOUBTFUL. 



Amphif^oa lucida Lamx. Histoir. p. 297. 



Amp. nodularia Dcne. Memoir, p. 111. 



= CoraUina nodularia Lamx. (sec. Dcne. Memoir, p. 111.) 



= Cymopolia rosarium Lamx. (do.) 



= CoraUina rosarium Lamk. Mém. Mus. I. p. 234. 



The first two species which are assigned to the Japan coast 

 only, have a peculiarity in the position of the conceptacles, which 

 are always found on the margins of the articuli, growing in a 

 row, pointing obliquely toward the ventral side of the frond. In 

 other respects, these species are closely related to the preceding 

 section. 



Madam Weber transferred Atnp. cretacea Endl. to Arthro- 

 cardia Aresch. The principal reason for doing so seems to be 

 grounded on the internal structure of the articuli. In the ex- 

 ternal appearance of the articuli the species suggests a position 

 near to Amp. rigicla Lamx. or C/ieilosporum iuberculosum. From 

 the former it is distinguished by the unizonal genicula and the 



