oatis, aquose coeruleo - aerugineis, raro in te rru p tis , indistincte articu-
latis ; vaginis arctissimis achrois pellucidis laevissimis. v. v.
D iam . 0. V. ‘ /««o— Viooo'" = 0 ,0 0 0 0 5 - 0 ,0 0 0 0 7 " .
b . f a s c i c u l a t a (Leptothrix Braunii Ktz. Phycol. gener. p. 198.),
fluotuans, fasciculata, sordide olivacea vel chalybea.
c . c o n t in u a (H. Braunii /Í continua Ktz. Spec. p. 2 6 6.), strato
membranaceo, chalybeo-viridi.
d . i r id e a Ktz. (1. c.), strato c h a l y b e o -purpurasoente.
Hab. in receptaoulis thermarum „ Baden-Baden “ legi ipse, nec
non van d. Bosch et communicavit ol. Suringar sub No. 1070 ; formae
b—c in aquis calidis ibidem.
H. cyanea Naeg. (in Ktz. Spec. p. 269. N. 20. Tabul. 1. T. 70. I l l . j .
H. strato membranaceo, nigro-fuligineo, opaco, subtus sordide aerugineo ;
trichomatibus pallide chalybeis, curvatis, dense in tric atis, inaequalibus,
passim interruptis, nonnunquam submoniliformibus, indistinote articulatis;
vaginis amplis, achrois, laevissimis, homogeneis, pellucidis. v. v.
Diam. V650— VsTo"' = 0,00013—0,00015", vag. usque ad
= 0,00026".
Hab. in rupibus madidis Helvetiae (prope Turioum: Naegeli, ad
Bosenlaui legi ipse I860.).
H. Reg elian a Naeg. (in Ktz. Spec. p. 267. N. 3. Tabul. I. T. 6/.).
H. strato coriaceo-tomentoso, tenaci, s a n g u i n e o - purpureo-nigrescente,
subtus pallido subdeoolorato ; trichomatibus leviter flexuosis subparallelis,
in te rru p tis , indistincte artioulatis ; articulis diametro subaequalibus ;
vaginis arctissimis, laevissimis, nonnunquam subluteolis. v. s.
Diam. c . V. = 0 ,0 0 0 0 7 -0 ,0 0 0 0 9 " .
b. Forma paulo erassior, strato subtus saturate aerugineo, trioh.
diam. usqne ad '/soo'" = 0,00011". v. v.
Hab. in rupibus madidis Helvetiae, Fyrenaeorum; prope Mentone
legit Dr. Boettcher.
H. N u l l ip o r a Grun. (in litt. c. icone). H. facìe externa Litho-
thamnium laoemosum aemulans, glóbulos calcáreos, pollicares vel semi-
pollioares, verrucosos, pallide cinéreos efflngiens ; trichomatibus leviter
ourvatis, articulis diametro aequalibus voi duplo brevioribus, hino inde
ad genioula constrictis, rarius granulatis ; vaginis arctis vel amplioribus,
achrois. v. io.
Diam. trioh. s. v. '/soo— '/soo"' = 0,00017 0,00029", vagin.
Vi50— Vsoo'" = 0,00059—0,00017".
Hab. in lacu „ Laxenburger Teioh “ ad Viennam Austriaoam (Dr.
Eeiohardt).
H. fu sc a -v io la c e a Stìz. (Bad. N. 772.). H. strato violaceo - fus-
oescente compacto ; triohom. rigidis luteolis distinote artioulatis ; articulis
diam. 2—3 -pio brevioribus; vaginis angustis achrois.
Diam. trich. s. v. (5 ,0 “™ ) '¡m '“ = 0,00019" c. y. (7 ,0 “™-)
1/322" ' == 000027".
Hab. in ripis fluminis „Neckar“ ad Heidelberg.
t t t Stratum rubrum (roseum, carneum, lateritium, rufum, rubiginosum,
rufo-fuscum etc.), sacpe c colore viridi in rubrum niutatnm vcl variegatum.
Stratum plus minus compactum, saepe longe lateque expansum,
haud raro admodum crassum, superficie rubefaotum, intus et subtus
colore vario vel decoloratum, interdum stratose quoque zonatum.
H. coriacea Ktz. (1. c. Leptothrix coriacea Ktz. Phyool. gener.
p. 198 N. 7. Leptoth. versicolor Naeg. in litt.). H. strato coriaceo
firmo, ruguloso (rugulis r e c t i s ) , rubro vel e viridi rubescente, aetate
proveotiore fuscosoente vel nigresoente, subtus saepe decolorato; triohomatibus
inaequalibus, s u b r e c t i s vel l e v i t e r c u r v a t i s , p a r a l l e l i s ,
pallide aerugineis, baud raro interruptis, distinote vel indistincte artioulatis
, nonnunquam subtorulosis ; articulis diametro aequalibus paulove
longioribus ; vaginis (pro et ratione aetatis et loci natalis) arctis vel amplis,
flrmis (quasi sicois) vcl muoosis, semper laevissimis, achrois, homogeneis,
pellucidis.
Diam. trich. s. vag. '/iso o -'/so o '" = 0 ,0 0 0 0 5 -0 ,0 0 0 0 9 8 " .
a. l ’o rma o v a g i n i s t e n u i o r i b u s .
a. coriacea g en u in a 7vte. (Eabenh. Alg. ed. I. N. 44!), strato sub-
lateritio vel 0 viridi rubofacto, vaginis mucosis, diam. '/looo — V««'"
= 0,00009—0,00011".
ß. R o r m a e v a g i n i s c r a s s i o r i b u s .
a. tu rfa c e a (Hypheoth. lateritia var. turfaoea Hepp in Eabenh.
Alg. N. 671.), strato lateritio, vaginis '/soo — '¡ in '“ = 0,00018
0,0002" crassis.
b. p a rie tin a Stizenb. (in Eabenh. Alg. N. 708. Wartm. N. 39.),
strato nigrescenti-fusco ; vaginis '/ 13 0— '/suo'" = 0,0002—0,00024" crassis.
c. Meneghinii Ktz. (Spec. p. 2 6 8 .), strato plerumque incrassato,
pallide rubro subcarneo, vaginis '/goo— '/sso'" = 0,00011 — 0,00016".
Hab. in muris et rupibus. madidis, neo non ad stagnorum margines,
per Europam minime rara.
H. rufescens (Ktz. 1. 0 .). H. strato plus minus compacto, irregulariter
rugoso, intus et subtus saturate lurido - aerugineo aut decolorato, nonnunquam
stratose zonato voi lamelloso; triohomatibus fl exuo so-cur -