﻿PLATE XXVIII. 



Cutleria cylindrica sp. 請* 



CUTLERIACE/E. 



Nom. Jap. Muchi-mo, 



Diap-n : Fronds of the sexual generation high, cylindrical, 

 stupose at base, dichotomous, with patent axils, tapering to both 

 extremities and filiform above ； of radial structure, being composed 

 axially of elongated and loosely set, fila'nentous cells, by the 

 decay of which the frond becoming tubular afterwards. Sori 

 of both sexes forming irregularly roundish, warty prominences, 

 densely scattered around branches ； female gametangia oblong 

 and the male cylindrical. Plant of the asexual generation is not 

 known at present. 



Hab, On rocks between tide-marks. Ise, Shim a, Sagami, 

 Boshu. ― m etangia in May. 



Fronds arise solitary or in tuft from a common callous disc 

 of diameter of a few milimeters. They are cylindrical and 

 furnished below with a short stem. Lower portion of stem and 

 surface of disc are stupose from the presence of btiffy-colourecl 

 hairs. The hairs are monosiphonous and branched divaricately, 

 being elongated by the division of terminal cells which are rich 

 in yellowish-brown contents. Above the stem, frond is repeatedly 

 forked, forks being nearer to each other in the lower part of 

 frond, while in the middle and upper portion, they are more and 

 more distant. Frond is, for the most part, 2-3 mm. thick in 



