THE SEA-WEEDS AT HOME AND ABROAD. 281 
Pollux, the twins of Tyndarus, and our humble alga is 
accordingly called Tyndaridea, and of it are many kinds 
growing tangled even, in the same mass. In similar and 
Fig 69. equally unlikely places for beauty to dwell 
\ and abide we can gather the Zygnema, or 
Yoke-thread, in the joints of which the 
green granules are at first arranged in 
spiral rings, but afterwards collect into a 
sinele globule as the future seed (fig. 69). 
In one species the spiral lines become a 
Zygnema. series of the Roman V, and in another of 
the letter X. Strangely, too, do the delicate and fragile fila- 
ments or silken threads bend at acute angles, the coloring 
matter first fillmg each joint, vig. 70. 
but soon contracting into a nar- 
row continuous stripe. In this 
‘and others of similar behavior 
and appearance we have Mou- 
geotia (fig. 70), named in mem- 
ory of a botanist, and bearing 
his surname. They are com- 
mon in Europe and New Eng- 
land. Before we leave these 
rich green, emerald and vivid, 
or pleasing green weeds of the 
stagnant and brackish pools, let 
me tell you of a pleasant surprise I once had in the sunny 
waters of an overflowed and stagnant pool formed by the 
rising of the lake, and there permanent through the year for 
want of means of draining it. Years have fled and the pool 
is solid ground now, covered by the property of the railroad 
company, and near Burlington, Vermont. The conchologist 
may be pleased to learn that Lymnaea megasoma Say, once 
lived there ; but my finding the elegant water-net, or Hydro- 
dictyon utriculatum, previous to its being seen by the cele- 
brated Bailey in Philadelphia and at West Point, will always 
AMER. NATURALIST, VOL. IV. 36 
Mougeotia. 
^ 
