232 SEA-WEEDS. 
























reminded of the Punctaria tenuissima, to be sought on the 
‘stems of various other fuci and sea-plants, in dense tufts, 
fronds very thin and attenuated towards the tips and base. 
Still, among the olive-colored Algæ, the order CHORDARIACEE 
embraces many distinct sea-weeds with gelatinous or cartile 
ginous fronds, whose seeds are concealed within the su 
stance. of the frond, of which the Chordaria and Mesogloi 
with conspicuous cylindrical fronds, and Elachista, or the 
Least Alga, consisting of little tufts of minute brown fron 
parasitical on the common rock-weeds, or fuci, and 
Myriad-thread, or Myrionema, which hastens the death 
the Red Algæ, are worth the looking for microscopical stud 
In the tide-pools grow also the sea-weeds which com 
the order Ecrocarrace® ; and on our shores are Zetocarpts 
brachiatus, and perhaps littoralis, pretty confervoid, b 
ing flaccid alge with numerous pod-like bodies, readily s 
with a lens; the Sphacelaria cirrhosa, a small species 1 4 
tle globose tufts, the thread-like branches slightly branch 
again in a pinnate manner, the seeds in round ci 
borne .on the sides of these smaller and shorter bran 
be examined with the magnifying glass; and, lastly, t 
dostephus verticillatus, with fronds six or eight inches 
and furnished with whorls of smaller branches closely 
ting the main stems, and giving them the appesa 
cylindrical wands of velvet surface, while the seeds 
borne on the sides of the smaller branches like those 
last mentioned. 
Enough has been said, then, of the green and 
blackish sea-weeds, a few words of the red or purple 
First are the RHODOMELACE®, red or brown-red 
ple sea-weeds, with leafy, or else with threadlike am 
fronds, the seeds of two kinds, the proper om we 
capsules on the ends of the branchlets; the ot 
tetraspores, in tubercules on the sides or other parts 
fronds. ‘These sea-weeds are fond of a more 
and latitude, but in this vicinity Chondria tent 
È, 
