S 19. L in nm ; fi]a;„ents veiy thick, of great length, curled, rigid, loosely
bimdled 5 articulations as long as broad. (T ab . CL. ^ .)
330. zuto ria ; filaments setaceous, long, flexuous, dark green; articulations once
and half as long as broad. (T ab . CL. B.)
331. to r tu o sa ; filaments rigid, slender, curled, interwoven in spreading stra ta -
joints twice or thrice as long as broad. (T ab . LIV. A.)
333. im p le x a ; filaments very slender, ra th e r flaccid, forming entangled, brio-ht-
green s tr a ta ; joints as long as, or longer than broad. (T ab. LTV. B .)°
* * Fixed hy the t
333. MeUjonium; filaments erect, straight, robust, slightly tufted, stiff and
wiry, dark green; joints twice as long as broad. (T ab. XCIX. A.)
334. ærea; filaments fixed, long, setaceous, tufted, straight, harsh, brittle
yellow-green; joints as long as broad. (T ab . XCIX. B.)
335. collabens; filaments long, straight, tufted, variable in diameter, gelatinous
and flaccid, æraginous green; articulations as long as broad with
dense, granular endochrome. (Tab. CCCXXVII.)
326. bangioides; filaments long, slender, soft, lubricous, wavy; articulations
twice as long as broad, containing at maturity a dense green mass ; dissepiments
broad and peUucid. (T ab . CCLXVIII.)
327. Voungana; fila,ments short, tufted, nearly straight ; articulations once or
twice as long as broad ; dissepiments contracted. (T ab . CCCXXVIII.)
338. claudestina. Berk. Gl. Br. Alg. t. 13. f. 1. {Unknown to me.)
XCIV. OCHLOCHÆTE.
329. Hystrix. (T ab . CCXXVI.)
Order 16. ULVACEÆ.
XCV. ENTEBOMOBPHA.
330. comucopiEej gi-egarious, smaU; fronds stipitate, suddenly dilated, at
length torn, plaited at the margin. (Tab. CCCIV.)
331. intestinalis ; simple, clavate, at length inflated, tapering much to the base.
( I a b . CLIV.)
332. compressa; branching, compressed, more or less compounded; branches
subsimple, obtuse, much attenuated at the base. (T ab . CCCXXXV.)
333. L inkiana ; cylindi-ioal, reticulated, very pale, membranaceous (rigid when
dry), much branched; branches alternate, spreading. (T ab . CCCXLIV.)
334. erecta; frond cylindrical, fiUform, slender; branches erect, opposite or
alternate, all attenuated to a point ; ramuli capiUary, erecto-patent • ceUs
rectangular, fiUed with endochrome. (T ab . XLIII.)
335. clathrata; cylindrical, filiform, slender, reticulated, much branched-
branches decompound, spreading, set with divaricated, spine-like ramuli!
(T ab . CCCXL.)
336. ramulosa; frond subcompressed, in-egularly branched; main divisions
long and subsimple; lateral branches curved and twisted, everywhere
clothed with short, divaricated, spine-Hke ramuli. (T ab. CCXLY.)
337. Hopkirkii ; frond byssoid, excessively branched ; branches erect, attenuate
bearing scattered, subulate ramuli ; reticulations very large, each areole coil
taimng one or two minute grains. (T ab . GCLXIII.)
338. p e r c u r s a ; capiUary, entangled, simple, compressed, subsolid, reticulated ;
ceUs quadrate, two or more in the breadth of the frond; endochrome
filUng the ceU. (Tab. CCCLII.)
339. R a l f s i i ; capillaiy, simple or nearly so, subsoUd, largely reticulated ; areoles
large, hyaline, 2 -4 in the breadth of the frond, each containing a bright-
green gi-ain of endochrome. (Tab. CCLXXXII.)
XCVI. ULVA.
340 la tU s im a ; frond broadly ovate or oblong, membranous, full-green.
' (Tab. CLXXI.)
341. I i a c tu c a ; frond veiy deUcate, at first saccate; then cleft to the base into
numerous laciniated fiat segments. (Tab. CCXLIII.)
342. l i in z a ; frond linear-lanceolate, undulate. (Tab. XXXIX.)
XCVII. POBPHYEA.
343. la c in i a ta ; frond deeply and irregularly cleft. (Tab. XCII.)
344. v u lg a r is ; frond simple, lanceolate, wavy. (Tab. CCXI.)
344.* P. miniata,k%.—Carm. Hook. Br. El. v. Ü. p. 310. {Unknown to me)
XCVIII. BANGIA.
345. f u s c o p n r p u r e a ; stratum brownish-purple; filaments long, simple, decumbent,
here and there constricted ; granules several in each transverse band.
(Tab. XCVI.)
346. c ilia r is ; filaments very minute, erect, simple, straight, compressed, p u ^ le ;
grains two or three in each transverse band, globose, sometimes solitary.
(Tab. CCCXXII.)
347. c e ram ic o la ; filaments parasitical, very slender, elongate, rosy ; articulations
once or twice as long as broad, longitudinaUy striate ; the endochrome
at length globular. (Tab. CCCXVII.)
348. c am e a , DUlw. t. 84. {Unknown to me.)
3 4 9 . (■?) e le g a n s ; filaments minute, dichotomous, with wide axUs ; granules
binate, in a single row. (Tab. CCXLVI.)
Order 17. OSCILLATOEIACEÆ.
XCIX. EIVTTLABIA.
350. p l i c a t a ; fronds gregarious, gelatinous, plaited, often hoUow and at length
ruptured, dull dark greeu; filaments wavv, associated in dichotomous series.
(Tab. CCCXV.)
351. a t r a ; globose, minute, veiy fii-m and smooth, glossy, black-green; filaments
densely packed. (Tab. CCXXXIX.)
352. a p p la n a ta , Carm. in Hook. Br. El. vol. ii. p. 392. {Unknown to me)
353. n i t i d a ; frond subgelatinous, lobed and plaited, hollow, lubricous, dark
shining gi-een. (Tab. LXVIII.)
C, SCHIZOSIPHON.
354. W a r r e n iæ . (Tab. CCCXVI.)
CI. SCHIZOTHEIX.
355. C r e s sw e lli i; tufts pulvinate ; filaments very slender, fastigiate, collected
into branching bundles. (Tab, CLX.)
e