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‘Ser. RHODOSPERMEZ. Fam. Ceramiee. 
Prats XXIX. 
MICROCLADIA GLANDULOSA, Grev. 
Guy. Cuar. Frond filiform, compressed, distichously branched, traversed 
by a wide, articulated tube, surrounded, by numerous, large, coloured, 
angular, radiating cells ; external coat formed of minute reticulated 
cellules. Fructification of two kinds, on distinct individuals : 1, ¢e¢ra- 
spores immersed in the ramuli; 2, sessile, roundish receptacles (fa- 
velle), having a pellucid limbus, containing numerous minute angular 
spores, and surrounded by several, short, simple, involucral ramuli. 
Microcrapia (Grev.)—from pixpés, small, and xdddos, a branch. 
Microctaptia glandulosa, Grev. 
Microcuapta glandulosa, Grev. Alg. Brit. p. 99. t.13. Hook. Br. Fl. vol. i. 
p- 293. Harv. Man. p.65. Wyatt, Alg. Danm.n. 68. Kiitz. Phyc. Gen. 
p- 382. Endl. 3rd Suppl. p. 36. 
DerxesseErtia glandulosa, 4g. Spec. Alg. vol. 1. p. 182. Ag. Syst. p. 251. Jones 
et Kingst. Fl. Devon. part 2. p. 66. 
Fucvs glandulosus, Soland. MS. Turn. Hist. t.38. E. Bot. t. 2135. 
Has. Growing on rocks in the sea, or on Alge, or Sponges, either near 
extreme low-water mark, or at a greater depth. Veryrare. Annual. 
Summer. Budleigh Salterton, and Torquay, Mrs. Griffiths. Falmouth 
Miss Warren. Teignmouth, Mr. Ralfs. 
Grocer. Distr. Southern shores of England. Atlantic shores of France and 
Spain. Marseilles, Kvitzing. Kamtschatka, Agardh. 
Descr. Roots fibrous, branching. Fronds tufted, one to four inches high, 
about a quarter of a line in width, compressed, much branched from the 
base in an alternate or irregularly dichotomous manner, forming roundish, 
fastigiate tufts. Branches distichous, angularly zig-zag, regularly divided, 
of nearly equal breadth throughout, the axils very patent, more or less 
furnished with short, forked or dichotomous ramuli. Ramuli 2—3 lines 
long, once, twice, or repeatedly forked, with rounded axils, and subulate or 
bifid apices, the points in the latter case hooked inwards. When viewed 
with a pocket lens of moderate power the frond appears inarticulate, but 
marked with large reticulations, the internal cells being seen through the 
semi-transparent cellules of the surface. Under a lens of greater power 
this appearance vanishes in a great degree, and the frond seems to be 
closely cellular. A transverse section (fig. 8) exhibits a wide, empty centre 
surrounded by several large cells filled with granular endochrome, and 
bounded externally by the numerous minute, much compressed cellules 
of the surface. A longitudinal section (fig. 7) shows us that the central 
tube is divided, at regular intervals, into a series of loculi or joints, sepa- 
rated from each other by thin, transparent diaphragms. Colour a fine 
blood or rose-red, darker towards the base, and acquiring a brownish shade 
in drying. Sudstance cartaligineo-membranaceous, adhering, but not closely, 
