26 ART. 12. — K. YENDO. 



palmata f. ß of Areschoug. It stands closely to Oheil. j^^ccnivs- 

 culum Yendo, and the latter may well be taken as its variety. 

 The difference lies in the shape of articuli ; the axial articuli of 

 the former having much more projected lobes, and those in the 

 latter being nearly triangular. Hence the specific name Corallina 

 Filicula should be reserved by priority. The illustration of Cor. 

 Filicula delineated by Kutzing in his Tab. Phyc. VIII. Taf. 60. 

 fig. 1. seems to represent a different species. 



Not a few of the present members have been unsatisfactorily 

 defined. Some of Decaisne's species which he described from 

 American plants should probably be reduced as synonymous with 

 others, or some described by other authors afterwards may be 

 identical with his. Decaisne's original definitions are often in- 

 complete and good for more than two distinct forms. Actual 

 examination of the authentic specimens is necessary to the solu- 

 tion of this problem. 



Sect. III. SEB-RATICARDIA Yendo. Enuraer. Cor. Alg. p. 193. 



Cheilosporum maximum Yendo. Cor. ver. Jap. p. 21. PI. II. fig. 18-19 : 



PL VI. fig. 9. 

 C. McMillani Yendo. Cor. ver. Port Renfrew, p. 718. PI. LII. fig. 4-5 : 



PI. LVI. fig. 11-14. 



SPECIES DOUBTFUL. 



Corallina officinalis L. /. robusta Setch. et Gard, (nee Kjellm.) Alg. N. W. 

 Amer. p. 365. 



The present section is characterized by the peculiar position 

 of the conceptacles. Those on the hexagonal articuli, mostly in 

 pairs, show the relationship to the Alatocladia ; those imbedded in 

 the apices of the pinnated rarauli suggest a transition to Corallina. 

 It differs from the latter genus by having the compressed con- 



