128 
CHORD ARIACEiE. — Liebmannia. 
iy. 
the same as his own. J. Agardh, taking up Areschoug’s M. Zosterce , as identical 
with his own Myriocladia Zosterce , states that the cells of the peripheric fila- 
ments are subspherical • and describes a new species, M. Lovenii , in which they are 
twice as long as broad. In my specimens now described I find the peripheric cells 
of the length attributed to those of M. Lovenii , and yet I hesitate whether to refer 
them to that species. I have not seen any authentic specimen of either Agardh’s 
or Areschoug’s plant, and must leave the final determination of the difficulty to 
those who have such specimens to compare. 
Plate X. A. Fig. 1 . Fronds of Mesogloia Zosterce , growing on Zoster a marina , 
the natural size ; Jig. 2, small portion of a branch, magnified ; Jig. 3, some of the 
axial and peripheric filaments of the same ; Jig. 4, portion of one of the peripheric 
filaments ; the latter figures highly magnified. 
III. LIEBMANNIA. J. Ag. 
u Frond cylindrical, branched, filamentous, solid, clothed with radiating periphe- 
ric filaments. Axis composed of oblong, approximated cells, cohering in longitudi- 
nal filaments ; the filaments toward the centre narrower, and there collected into a 
peculiar dense stratum. Peripheric filaments arising from the outermost axial 
cells, mucous, moniliform, forked. Spores obovoid, seated in the axils of the 
radiant filaments, girt with a hyaline perispore. Propagida at the apex of the 
radiating fibres lancioid, one, two or four, sessile within a hyaline, inflated, obpyri- 
form perispore, sub-articulate-constricted, and longitudinally divided.” — J. Ag. 
Liebmannia Leveillei , J. Ag. Alg. Medit. p. 35. Sp. Alg. vol. 1 , p. 61. Mesogloia 
Leveillei , Menegh. Alg. Ital. p. 283, b. 5, t. 2. 
II ab. Parasitical on Zostera. At Vera Cruz., Mexico, Liebman. (v. s. in 
Herb. T.C.D.) 
I give the characters of this genus as nearly as possible in Prof. J. Agardh’s 
words. I have not seen an American specimen, but possess an Adriatic one from 
Prof. Meneghini. This has the outward characters of Mesogloia vermicularis. 
