CORALLINiî^: VER^ JAPONICihL 07 



subintertextis ; articulis imcqualibus sursuiii atteiiiuitis et brevioribus, 

 mediis superioribusque cylindraceis omnibus diametro 8-13 plo 

 longioribus, ultimis Jatis unguliforinibus vel cylindraceis, dichotomiis 

 superioribiis ultiniisque conceptaculiferis ; conceptaculis urnaeformibus 

 cornibus simp] ici bus. 



f. brevior, f. nov. PI. III. fi«\ U. PI. VII. Hg. *). 

 Fronde tenuiore, articuJis brevioribus diametro i2-3plo longi- 

 oribus, superioribus subclavatis, ultimis unguliformibus vel globosis. 



The typical form has a similar habit to Cor. (idliwrcns^ Lamx. in 

 forming a large mass of spongy network. /'. hrevior is more robust 

 than the type in virtue of the shortness of the articuli. These two, 

 however, approach one another and shar]) boundary is impossible to 

 draw. 



The ultimate articuli of a sterile frond have a special character. 

 They are broad and compressed at the apical margin, cylindrical at 

 the base : the apparent shape, therefore, is like a horse's hoof, after 

 which the plant has been named. This character is owing to the 

 peculiar mode of ramification. An articulus tends to ramify when 

 it is yet very short ; or one articulus is prolonged after it has given 

 forth the successive articuli. The matured plant, as a consequence, 

 has a few articuli of this sort and becomes difficult to separate from 

 the loose form of Cor. decussato-dicliotoma. 



The typical form has been found in the Pro v. of Wakasa (Mr. 1\. 

 Tsuge), and at Misaki ; /'. hrerior, in the Prov. of l^öshü : both at low 

 water mark. 



8. Corallina sp. 



PI. ni. fig. 10. 



A tiny plant irregularly dichotomous, with patent branches ; 



