288 THE SEA-WEEDS AT HOME AND ABROAD. 
deeper soundings where that mollusk abounds. A much 
more slender and delicately jointed kind, scarcely more than 
simply branching, is the Jania, presenting under the surface 
of the ocean a violet green tint, which soon changes to a 
more or less deep rosy or red, and finally becoming shining 
white if exposed to the air and light, growing parasitically 
on other sea-weeds and widely distributed. Some elegant 
species are known in Cuba and on the southern coast of the 
Fig. 75. United States, and others are found in 
the oceans about Australasia, Cape of 
Good Hope, ete. The Amphirow, also 
widely distributed over the globe, are 
lime-bearing Corallines, the joints cylin- 
drical, separated from each other by bare 
portions of the horny axis, the seeds 
lodged like those of all the Corallines 
in conical wart-like conceptacles, the 
different parts of the little plant on which 
these occur furnishing some criterion to 
determine its real name. Beautiful and 
— interesting as they seem in living condi- 
tion, a more intimate examination assists in revealing their 
curious structures. Having in this excursion for northern 
lime-enerusted sea-weeds stepped into the domains of the 
odosperms, or rosy-seeded algze, let us take leave of our 
verdant acquaintances, and cultivate the friendship of a 
higher series of marine plants, whose seeds and seed-vessels 
are more curious, elegant and diverse. 
The alge in this order are by far the most universally 
attractive of any of our native kinds. That part which 
looks like their foliage, and is technically called the frond, is 
liable to a great difference in size, shape, and outline, in 
some being broad, or flat, or narrow, or thread-like, the main 
stem frequently dividing. or the disk-like support on which 
it rests suddenly spreading and ramifying upwards, the 
branches often arranged in regular pinne, or lateral wings, 
