Fig. 296. CLADOPHORA MACALLANA. 
Colour. A rich grass-geeen ; fading in the herbarium. 
Substance. Eigid ; bristling ; adhering yery imperfectly to paper. 
Character of Frond. Thread-like (^filamentous) ; jointed ; several growing near together and 
entangled in intricate bundles ; excessively branched. Filaments as thick as hogs’ 
bristles throughout ; irregularly set with long, very wavy, alternate or rarely oppo- 
site branches. Branches re-branched in the same way ; more or less clothed with 
short, back-curved, very wide-spread branchlets, w’hich are either simple, or set on 
one side like a comb (^pectinated) with a second set. Tips obtuse. 
Joints. Twice or thrice as long as broad throughout ; filled with rather dense-green colouring 
matter (^endochrome). 
Measurement. From 6 to 20 inches long. 
Fructification. Minute seeds (^zoospores) formed of the colouring matter in the joints ; and in 
due time bursting through them. 
Habitat. West of Ireland. Eoundstone Bay, &c. On the sandy bottom of the sea, in from 
four to ten fathoms’ water. Obtained by dredging, or thrown ashore. 
Like C. rectangularis in general appearance ; from which, however, its pectinated, instead 
of opposite branchlets completely distinguish it. 
Fig. 297. CLADOPHORA HUTCHINSI.^. 
Colour. Bluish green, with changeable tints when fresh ; fading in the herbarium. 
Substance. Eigid ; crisp ; bristling ; but more or less adhering to paper. 
Character of Frond. Loose tufts of jointed threads {filaments) very much branched. Filaments 
as thick as hogs’ bristles throughout ; wavy ; several times irregularly divided and 
branched. Branches distant ; spreading ; more or less furnished with short, slightly 
curved branchlets having a few secund^ one-jointed branchleteews along their inner 
face. Tips very obtuse. 
Joints. About twice as long as broad throughout ; the partition-lines {dissepiments) contracted ; 
filled with green colouring matter {endochrome). 
Measurement. From 6 to 8 inches long. 
Fructification. Minute seeds {zoospores) formed of the colouring matter in the joints, and in 
due time bursting through them. 
Habitat. Bantry Bay. Isle of Man, and a few stations on our coasts. 
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