56 \OTKs ON \ US TK A T.I A N MARINE AL(i.K, i., 



month of bhe year. The oblong Bori of betrasporangia radiate 

 outwards towards the edge of tin* frond. 



P0LY8IPHONIA compacta, sp.n, 

 despite densissimo, pulvinato; filis benuibus, omnino articu 



latis el eeortieatis; primariis decumbentibus vel repentihus im 



plicatis, largiter radieantibus; secundariis adscendentibus a basi 

 erectiusculis, paroius dichotomis vage ramulosis; ramulis sparsis 

 angustis axilUs erectiusculis; arbiculis plerumque 9-siphoniis, 

 Alorura primariorum diametro sesquilongioribus, secundariorum 

 aequalibus, ramulorum ultimorum gradatim brevioribus; apicibus 

 simplioibus vel Beeps furcatis fibrill is coronals : tetrasporangiis 

 in medio ramujo immersis seriatis, apparenter e singulo siphone 

 bransformatis : cvstooarpiis nondumvisis, Coloreobscure rubro 

 vel brunneo-purpureo; substantia mollissiina, 



(hows in oushion or moss like patches which cpver and follow 

 bhe inequalities o\' the rock. Variable in outline, irregularly 

 ova); the patches may attain a Longest diameter oi 80mm. or 

 more, and may become confluent. The lower layer forms a firm 

 imbricate reticulum; the upper, rising to a height oi 10 [6 mm., 

 consists ^^ free ramuli, very soft to the touch 



The primary filaments, somewhat stouter than the secondary, 

 creep over the rock surface, and are attached bo it by numerous 

 simple or forked colourless rhisoids. These di> not arise from 

 every joint, but as many as ii\e may spring from one articulus. 

 Bach rhiioid, or division o't ■ rhisoid, terminates in an expanded 

 adhesive disc. The rhizoids were generally about twice as long 

 as the ,i<»int to which they were attached, and their diameter was 

 about I or I of that ^i bhe joint. 



The betrasporangia not moniliform, but extending in » series 6f 



bo nine or more in the middle ^^ the ramulus. Fertile lamulus 



not infrequently branched, sometimes bearing an immature 

 fertile ramellus. Nocystocarps or antheridia as yet observed. 



A narrow colourless .-one, at each articulation, separated the 

 siphons of adjacent joints. Siphons nearly constantly nine. 

 Hah Rock-pools left by falling tide; Farm Cove, Tort Jack 



son. Associated with Ccramium clavatum. 



