IV. 
CIT0RDARLACE2E. — Mesogloia. 
127 
beautifully beaded ; more slender and much longer than in M. vermicularis ; but 
shorter, and with more globose joints than in M. Zoster ce. The colour is an oliva- 
ceous green, becoming rather greener after the specimen has been dried. The 
substance is very soft and gelatinous. 
My figure is taken from one of the Sand Key specimens. These are less villous , 
owing to youth, than most specimens of the species, and have more the aspect of 
M. Griffithsiana , but on a close microscopic examination they appear to have all the 
characters proper to M. virescens. Miss Brewer’s specimens are still younger, but, 
though growing on Zostera, appear to belong to virescens and not to the following. 
Plate X. B. jig. 1. Fronds of Mesogloia virescens , the natural size ; fig. 2, 
small portion of a branch, magnified ; fig. 3, peripheric filaments, attached to the 
axial ; fig. 4, a peripheric filament removed, the latter figures highly magnified. 
* 
3. Mesogloia Zosterce , Aresch. (?) ; frond filiform, gelatinous, flexuous, slightly 
branched ; branches very short and subsimple, distant, villous, patent, with rounded 
angles ; filaments of the periphery much longer than the diameter of the axis, lax, 
submoniliform, with ellipsoidal cells, twice as long as their diameter. Mesogloia 
Zosterce , ? ; Aresch. Pug. t. 8, f. 1, a. 6. Myriocladia Zosterce ? or M. Lovenii ? 
J. Ag. Sp. Alg. vol. 1 ,y>. 53. (Tab. X. A.). 
IIab. On Zostera in deep water. Annual. Halifax, W. H. H. 
Fronds 6-8 inches long, very slender, filiform, flexuous or angularly bent, either 
without lateral branches, or furnished at distant intervals with a few very short, 
patent, or divaricating, simple or forked ramuli, from a line to an inch in length, 
but seldom longer. These branchlets issue at very wide angles, and sometimes at 
the point where they arise the main stem takes a bend in the opposite direction, 
as if the proper mode of branching were dichotomous, but that one of the forks 
were perpetually aborted into a ram ulus. The peripheric filaments are much longer 
than the diameter of the axis which they clothe, and are laxly set, surrounded by 
a loose jelly. They are dichotomous, and spring from slender longitudinal fila- 
ments coating the internal filaments of the axis, but which I have failed to detect 
anastamosing into a net work, as described by J. Agardh (if we are really speaking 
of the same plant). The articulations of the radiating filaments are fully twice as 
long as broadband but slightly contracted at the dissepiments. The colour in my 
specimens is a yellowish olive. 
Few plants have been more confused by authors than the Linckia Zosterce of 
Lyngb., Mesogloia Zoster ay Aresch. ; and I hope I am not farther confusing synonyms 
by referring to this place the plant now described and figured. Lyngbye’s figure 
is certainly very unlike my plant, and is referred by J. Agardh to the young of 
Mesogloia virescens , which it much more nearly resembles. But Areschoug, 
whose figure accords more nearly with that now given than with the previous 
figure of Lyngbye, has examined a specimen of Lyngbye’s plant, and declares it 
