Fig. 31. CHORDA FILUM. 
Colour. Dark olive-brown. 
Substance. Gristly and very firm wben recent ; slimy ; slipping tbrougb the fingers. 
Character of Frond. Perfectly simple. Like long boot-laces ; one from each minute disk-like 
root ; growing in large companies, in sandy or muddy bottoms ; cylindrical ; tapering 
at both ends, clothed with pellucid hairs. 
Measurement. From 1 to 20, or even 40 feet long in deep water. From J to J inch in 
diameter. About as thick as a round slate-pencil. 
Fructification, Minute seeds (spores) covering the whole surface of the frond. 
Habitat, Our shores generally. From between tide-marks to ten or fifteen fathoms of water. 
Very abundant. 
What has been considered a small variety, G. tomentosum, is densely covered with olive or 
green cobweb-like hairs. But Dr. Harvey believes this to be the case with all the infant 
plants of this species. 
Fig. 32. CHORDA LOMENTARIA. 
Colour. Brownish or yellowish olive. 
Substance. Soft, membranaceous. 
Character of Frond. Perfectly simple. When young, like boot-laces, each from a minute 
disk-like root ; more delicate in quality than C. filum ; cylindrical ; tapering at both 
ends ; when full-grown, contracted at intervals as if tied in ; the intervals inflated. 
Measurement. From 3 to 16 inches long. One-third of an inch in diameter when largest. 
Often much smaller. 
Fructification. Minute seeds (spores) covering the whole surface of the frond. 
Habitat. Our coasts generally. On rocks and stones between tide-marks. Common. 
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