Marine Plants of Nha Trang — Dawson 
381 
Fig. Lyngbya aestuarii: Terminal portion of a filament showing the slightly tapered and capitate apex of the 
trichome, X 183. b, c, Lyngbya confervoides: b. Portion of a discontinuous filament 14 n in diameter (11300), X 400; 
c, portion of a filament 18 in diameter including the thick sheath (11406), X 208. d, Lyngbya majuscula: Terminal 
portion of a filament 65 n in diameter including the thick, stratified sheath, showing the blunt, rounded apex, 
X 150. e, Calothrix pilosa: Terminal portion of a filament, X 160. /, Osdllatoria margaritifera: Terminal portion of 
a filament, X 200, g, Oscillatoria nigro-viridis: Terminal portion of a filament 6,5 m in diameter, X 630. h, Phor- 
midium corium: Portion of a filament 4.5 m in diameter with thin sheath and indistinct cell walls, X 650. /, j, 
Brachytrkhia maculans: /, Vertical section through the colonial thallus, X 34; /, portion of an individual filament 
within its thick sheath, X 420. k, /, Brachytrkhia quoyi: k. Habit of a small colony, XI;/, portion of an individual 
filament, X 275, m, Hormoth amnion solut urn: Small portion of a filament bearing a heterocyst, X 333. n, Hormotham- 
nion enteromorphoides: Small portion of a filament bearing a heterocyst, X 333. o, p, Symploca hydnoides: o, Habit of 
a tufted plant, X 1; p, portion of a filament 5 ju in diameter with cells 10-12 n long, X 500. q, Hydrocoleum lyng- 
byaceum: A young filament attached to the surface of Hypnea, X 257. r, Bntophysalis conferta: A small portion of a 
gelatinous colony, X 500, j, Calothrix aeruginea: An individual filament, X 215. t, Calothrix contarenii: An individual 
filament separated from a colony, showing the basal heterocyst, X 275. 
