13 



ffi LIV [H Jig. 10-14 p. 10 : Gelidium pusillum (Stackh.) Le Jol., 

 d> T A, <' 3, / m * r ft, S ^> * -11: & 3 ' 10 If- @ & ' 



f-i2: y. ) * ffi / - sr> 7 a K a ? m ^ ^ * ^ ; >-. ft ^ ^ ; 



*.-13 :pgJKadFg'?^^^flS/ -SB, \ 3 -14 : m Jfe ^ ^ ^ 



fit ^ - , ^. 



Herpopteros zonaricola n. sp. 



Nonii Japi : Sldnobu-gusa. 

 PL. LV. 



Diagn. Fronds filiform, creeping o*h other algae, with dorso-ven- 

 tral structure, alternately branched ; main branches with longer or 

 shorter pinnae which are similarly pinnated with teeth-like pinnulae. 

 Branches arise spirally in -5- divergence, of which one dorsal and 

 two ventral ones remain undeveloped and the remaining two grow up 

 to normal branches subdistichously arising from somewhat dorsal 

 side of frond. All of them either undeveloped or growing carry 

 dichotomo-decompound hair-leaves on their apices. Pericentral cells 

 five in number, of which two are disposed on the dorsal side 

 and three on the ventral, and throughly ecorticated. Tetrasporangia 

 produced in somewhat stichidia-like pinnulae, being arranged 

 in a slightly twisted longitudinal order with a single sporangium 

 in every articulation and provided with a single disordered row 

 of the remains of hair-leaves on the dorsal side, externally 

 covered with two cover-cells on the ventral side. Antheridia pro- 

 duced on hair-leaves on the terminal portion of pinnulae. Cystocarps 

 ovate and sessile. 



Hab, : On the frond of Zonaria Dicsingiaita J. Ag. growing 



