1 5 8 . f a r in o s a ; minute, irregular in outline, rather thin, pallid, with 2 - 3 prominent
ceramidia. (T ab . CCCXLVII. £ .)
1 5 9 . v e r r n c a t a ; thin, expanded, irregularly lobed, paUid, dotted over with
minute, pimply ceramidia. (T ab . CCCXLVII. 0.)
160. p n s tu l a t a ; thick, dull purple or green, oblong, in cn istin g ; ceramidia
numerous, large, prominent, conical. (Tab. CCCXLVII. E.)
XLIX. HILDENBBANDTIA,
1 6 1 . r u b r a . (T ab . C C L .)
L. HAPALIDIUM.
162. F h y lla c tid ium , Kiitz.; flabelliform, variously lobed, colourless. (litko -
cystis Allmanni, T a b . CLXVI.)
Common on Algæ round the British coasts ; and, according to Kützing,
found abundantly in the Mediterranean and in New Holland. Our figure
represents the young plant, which afterwards becomes much more lobed
and expanded.
Order 10. DELESSERIACEÆ.
LI. DBLESSEBIA.
1 6 3 . s a n g u ín e a ; stem short, cartilaginous, bearing oblong, transversely veined,
entire, undulate leaves ; veinlets opposite. (Tab. CLI.)
1 6 4 . s in u o s a ; stem branched, bearing oblong or ovate, deeply sinuate or pin-
natifid, toothed, pennate-ribbed leaves ; nerves opposite. (Tab. CCLIX.)
1 6 5 . a l a t a ; stem dichotomous, decompoundly branched, winged throughout
with a narrow, membranous, pennate-neiwed lamina. (T ab. CCXLVII.)
166. a n g u s t i s s im a ; frond very n a iT o w , compressed, two-edged, distichously
much branched, destitute of membrane. (T ab . LXXXIII.)
1 6 7 . H y p o g lo s s u m ; frond linear-lanceolate, repeatedly proliferous from the
midrib with leaflets of similar form ; leaflets acute. (Tab. II.)
1 6 8 . r u s c if o l ia ; frond linear-oblong, repeatedly proHferous from the midi’ib with
leaflets of similar form ; leaflets round at the apex. (T a b . XXVI.)
LII. NITOPHYLLUM.
1 6 9 . p n n c t a tu m ; frond very thin and delicate, nerveless, more or less regularly
dichotomous, rose-red ; axUs rounded ; sori large, oblong, scattered over the
whole surface. (T ab . CCII. and CCIII.)
1 70. H i l l iæ ; frond thickish, veiny toward the base, roundish, irregularly cleft;
segments oblong, obtuse ; sori very minute, dot-like, densely scattered over
the surface of the frond. (T ab . CLXIX.)
171. B o n n em a is o n i; frond shortly stalked, fan-shaped, variously cleft; segments
wedge-shaped ; spots of granules minute, roundish, scattei'ed over the
surface. (T ab . XXIII.)
172. G m e l ia i ; frond crisp, stipitate, veined at the base, fan-shaped, vaguely
cleft; segments broadly wedge-shaped, waved, and curled; sori linear
marginal. (T ab. CCXXXV.)
173. la,ceratum; frond subsessile, rigidly membranous, traversed by branching
veinlets, dichotomous ; segments linear or cuneate, waved at the margin,
obtuse ; sori oblong, marginal. (T ab . CCLXVII.)
SYNOPSIS OP THE SPECIES. XXV
174. v e r s ic o lo r ; stipitate; frond fan-shaped, circumscribed, subdichotomous or
irregularly cleft, veinless, incrassated at the base; segments rounded.
(T ab . IX.)
LUI. PLOOAMIUM.
175. c o c cm e um ; frond narrow, piano-compressed; ramuli subulate, secund,
3 or 4 consecutively; pectinate on their inner edges. (T ab . XLIV.)
Order 11. EHODXMENIACEÆ.
LIV. STENOGBAMME.
176. in t e r r n p t a ; stipitate, membranaceous, flabelUform, dichotomously cleft;
apices obtuse ; conceptacles forming a nerve-like Hue through the centre of
each lobe. (T ab . CLVII.)
LV. EHODYMENIA.
177. b if id a ; thin and semitransparent, dichotomous; segments linear or cuneate
; apices obtuse ; tubercles mostly marginal, sessUe ; tetraspores transversely
zoned. (T ab . XXXIl.)
178. l a c in i a t a ; frond thickish, subopake, bright red, flabelliform, deeply cleft;
segments wedge-shaped, obtuse ; margin curled and fringed with minute
processes in which the tubercles are imbedded. (T ab . CXXI.)
1 7 9 . P a lm e t t a ; stipes cylindrical, elongate, expanding into a fan-shaped, rose-
red, dichotomously cleft frond ; segments linear, with rounded interstices ;
margin entire, flat ; tubercles sessile, marginal or scattered ; sori eUiptical,
solitary in the expanded apices. (T ab . CXXXIV.)
1 8 0 . c r i s t a t a ; fan-shaped, membranaceous, deeply laciniate ; segments dilated
upwards, repeatedly divided; lesser divisions laciniate at the ends and
often fimbriate ; tubercles spherical, marginal, sessile. (T ab . CCCVII.)
1 8 1 . c i l i a t a ; frond thick, subopake, duU purplish-red, shortly stipitate, lanceolate
or forked, irregularly pinnated with lanceolate or bifid segments ;
margin fringed with subulate processes, in wliich tubercles are imbedded
(T ab . CXXVII.)
1 8 2 . j u b a t a ; frond thickish, flaccid, dull red, linear-lanceolate, cirrhose at the,
apex, pinnatifid ; margin and often the disc beset with filiform processes.
(T ab . CLXXV.)
183. p a lm a t a ; frond coriaceous or membranaceous, dull purple, broadly wedge-
shaped, irregularly cleft, palmate or dichotomous, sometimes laciniate, and
verynaiTow; margin flat and even, simple or winged with leaflets; sori
cloud-like, dispersed. (T ab . CCXVII. and CCXVIII.)
LVI. SPHÆBOOOCCUS.
1 8 4 . c o r o n o p ifo liu s ; much branched; branches alternate or subdichotomous,
multifid ; laciniæ acute, fringed with cilia ; tubercles in the marginal cilia
(T a b . LXI.)
LVII. GBAOILABIA.
1 8 5 . m u l t ip a r t i t a ; frond fiat, tender, purplish-red, deeply cleft, irregularly
dichotomous or fingered ; branches linear-wedge-shaped ; tubercles conical,
veiy prominent, scattered plentifully over the segments. (T ab . XV.)
1 8 6 . c o m p r e s s a ; frond succulent, brittle, subcompressed, irregularly branched;
branches long, tapering ; tubercles prominent, ovate, scattered. (T ab. CCV.)