AKT. 12. K. YEN-DO. 



II. Genicula not specially differentiated ; main hranches dicliotomously 

 divided, with compressed articuli ; ramuli pinnate, with cylindrical 



articuli Gen. ir. Lithothrix. 



III. Genicula unizonal, rarauli starting from articuli. 



a. Conceptacles sessile immersed in articuli or pinnulets 



Ge-«. r. Cheilosporum. 



i. Fertile articuli sagittate with pointed wings, conceptacles immersed 



in the upper margins of the sagittate articuli .. 



Sect. I. Eucheilosporum. 



ii. Fertile articuli sagittate or reniform with round or truncate 

 wings, conce^Dtacles immersed in the outer margins of the articuli, 

 or in the surface of the articuli Sect. II. Alatocladia. 



iii. Articuli compressed hexagonal, conceptacles wartlik ■, on the sur- 

 face of the articuli or immersed in the pinnulets 



Sect. III. Serraticardia. 



b. Conceptacles stalked, mostly taking the place of a segment. 



i. Branches pinnated Gen. rr. Corallina. 



a. Pinnules simple or less decompound Sect. I. Officinales. 



ß. Pinnules densely decompound Sect. II. Halyption. 



ii. Branches dichotomous Gen. rif. Jania. 



SPECIAL PART. 



Ge.,. I. AIVIPHIROA LAMX. 

 Sect. I. EUAMPHIiiOA Dcnk Memoir, p. 111. 



Amphiroa anastomosans AV. v. B. Coral. Sib. Exp. p. 91. PL IG. fig. 



3-4. 

 A. valonioides Yendo. Coral, ver. Jap. p. 5. PL 1. fig. 1-3 ; PL IV. 



fig. 1. 

 A. fragilissima f. fragilissima W. v. B. Coral. Sib. Exp. p. 00. 



= Amp. fragilissima Lamx. Exp. Method, p. 26. t. 21. fig. d. 



= Cor. frngilissima Ellis et Sol. Coral, p. 123. Tab. 21. fig. 9. 



= Amp. debilis Kütz. Spec. p. 700. no. 3. 



= Cor. rigens Pall. Elench. Zooph. p. 429. no. 11. 



