514 
ZOOPHYTA. CORALLINAD^. 
Jania. 
Gen. XXXIV. JANIA. — Branches subdividing dichotomous- 
ly ; filiform, with cylindrical joints. 
78. J. ruhens. — Summits of the lower joints of the stem sim- 
ple. — Not uncommon on the English, Irish, and Scottish coasts. 
This species is subject to considerable variation in its general appearance 
and growth, arising from age and station. 
A. Nearly uniform in thickness throughout, branches terminating in short 
bifid processes.. — Corallina ramulis dichotomis, teneris, capillaribus, et ru- 
bentibus, Ellis^ Cor. p. 50. No. 5. tab. xxiv. f. e. E — C. rubens, Pallas^ El. 
p. 426. No. 7. 
B. The last joint but one, swollen at the summit, a character more or less 
conspicuous on the other joints. The terminal ones blunt C. dichotoma, 
capillis densis, cristatis, spermophoris, fuels minimis teretibus adnascens, 
Ellis, Cor. p. 51. No. tab. xxiv. f. £ F — Cor. crista ta, Pall. El. p. 425. 
No. 6 Cor. rubens, Linn. Syst. p. 1304. No. 3. 
C. Joints supporting the two last subdivisions clavate, terminal ones in 
pairs slender, many-jointed, seldom dividing. — Cor. alba spermophoros, ca- 
pillis, tenuissimis, Ellis, Cor. p. 51. No. 8. tab. xxiv. f. g. G. Both Pallas 
and Linnseus make this a variety of var. B. — It seems to be in the last stage 
of growth. The Cor. plumosa nivea, fuco minimo tereti adnascens of Ell. 
Cor. p. 52. No. 9. tab. xxiv. f. h. H. H. 1., the C. globifera of Turt. B. Fauna, 
No. 701. p. 212, is certainly this species in its first stage of growth, and when 
it consists of only two or three joints rising from a globular base. Var. A. 
is the next stage. In some cases, a few of the lower joints are two-horned, 
like the following species. 
79. J- cornicidata. — Summits of the lower joints of the stem 
subcompressed, and produced on each side. 
Cor. alfea exigua, ramulis dichotomis segmentis corniculatis, fucis mini- 
mis teretibus adnascens, Ellis, Cor. p. 50. No. 6. tab. xxiv. f. d. D 
Cor. corn. Pallas, El. p. 424. Linn. Syst. p. 1305. — On the English 
coast, Ellis. 
Gen. XXXV. CORALLINA.— Branches subdividing tricho- 
tomously. In consequence of this mode of growtli there 
is always the appearance of a primary stem, and the sum- 
mits of the joints are compressed and dilated, except in 
old specimens, where the lower joints are cylindrical, and 
destitute of lateral branches. 
80. C. officinalis. -^The short lateral shoots of the branches 
rounded, and blunt or capitate. 
Cor. anglica, Raii, St. Br. p. 33. Ellis, Cor. p. 48. tab. xxiv. No. 23. a. A. 
A, 1. A. 2. B. B. 1. B. 2. — -Cor. off’. Pallas and Linnesus. — Common on 
all parts of the coast. 
This is subject to vary greatly in its appearance, according to the station 
it occupies. At certain seasons the heads of the pinnules are enlarged into 
cells, and similar tubercles occur on the sides of the joints, out of which 
Ellis squeezed ‘‘ little twisted figures.” 
