(235 
speciosum :aund,, ,Desm. Suec., p.34, pl..3,£.5, 1871. . 
tv. australianum Nord., Fry. Alg. N.Z., p. 79, Pl. 5, £. 9, 1888. 
*y. difficilis Rac., Desm. Ciast., p. 15, Pl. 6, f. 16, 1892. 
subspeciosum Nord., Desm. Arct., p.22, Pl..6, f. 13, 1875. 
var. validius Nord., Frw. Alg. N.Z., p. 49,-Pl. 5, £10, 1888. 
binum ‘Nord;, in Wittr. & Nord. Alg. Exsicc., No. 383, .1880. (Not 
noted.) 
*forma Rac., Desm. Ciast.,-p. 16, Pl. 6, £. 25, 1899. 
{var. fontense Playf.,:Plankt.-Sydney Water, p. 530, Pl. 54, £. 17, 
1913. ‘ ‘ 
(C. subsp. 6 validius f. fontensis Playf., Desm. N.S.W., p. 198, 
Pl. 5,429, 1907.) 
fusum Roy & Bissett, Japan Desm., p. 3, Pl. 268, £20, 1886. 
subcostatum Nord., Desm. Ital., p. 37, Pl. 12, £..18, 1876. (Not noted.) 
forma minor W..& G. S..West, Welwitsch Afr. Alg., p. 122, 1897. 
var. Beckii (Gutw.) W. i&G.'S. West, Br. Desm., il, p. 238, Pl. 87, 
f..10-12, 1908. 
var. australe Playf., Biol. Richm. R., p. 102, Pl. 3, f. 11, 1914. 
punctulatum Bréb., Liste, p. 129, Pl. 1, f..16, 1858. 
mesoleium (Rac.) Playf., Some Sydney Desm.,-p. 615, 1908. 
f{.adulta Playf., 2bid., Pl. 13,.£. 1,.1908. 
f, asperrima Playf., ibid., f. 2, 1908. 
var. thomboideum. Rac., Nowe Desm., p. 15,:Pl..1, £27, 1889. 
f. australis Playf., /.c., Pl. 18, £. 3, 1908. 
var. arcuatum Playf., idid., p. 616, Pl..13, f..4, 1908. 
*Willeanum Rac., Desm. Ciast., p. 14, Pl. 7, f. 4,°1892. 
~*suborthostichum Rac., ‘Desm. Ciast., p. 14, Pl. 6, f. 14, 1892. 
turgidum Bréb., in Ralfs Brit. Desm.,.p. 110, Pl. 32, £. 8, 1848. _ 
var. subrotundatum West, Alg. Hng. Lake District., p.729, 1892. 
alpestre Roy & Bissett, Scottish Desm., p. 41, Pl. 1, f. 6, 1894. 
elegantissimum Lund., Desm. Suec., p. 53, Pl. 3, £. 20, 1871. 
amcenum Bréb., in Ralfs Brit. Desm., p. 102, Pl. 17, £.3, 1848. (Not 
noted.) Sa 
fvar. mediolwve Nord., Frw. Alg. N.Z.,p. 50, Pl. 5, £. 12, 1888. 
var. intumescens Nord., ibid., Pl. 5, f. 13, 1888. 
glyptodermum W.'& G. S. West, rw. Alg.Madag., p. 69, Pl. 7, £.:28, 
1895. 
tholiforme Cohn, Desm. Bong., p.9, Pl. 11,1. 9, 1879. 
magnificum Nord., Frw. Alg. N.Z., p. 62, Pl: 6, f. 19, 1888. 
var. Italicum Rac., Nowe Desm., p. 93, Pl. 6, £. 1, 1889. 
var. fluviatile Playf., ‘Biol. Richm. R.,p. 104, Pl. 3, £..17, 1914. 
denticulatum Borge, Austral. Siissw., p. 19, PI. 3, f. 31, 1897. 
amplum Nord., Frw. ‘Alg. N.Z., p. 63, Pl. 6, f. 20, 1888. 
~var. Ciestoni (Rac.) mihi. 
*(Pleuroteniopsis'Ciastoni Rac., Desm. Ciast., p. 371, Pl. 6, £..6, 
1892.) bus : 
~uliginosum Playf., Some Sydney Desm., p. 617, Pl. 13, f. 6, 1908. 
AskenasyiSchm., Alg. Sumatra, p. 304, Pl.:4, £. 7, 1895, 
‘var. crateriforme Playf., 'Frw. Alg. Lismore, p. 327, Pl. 42, f. 6, 1915. 
+ This form combines the characteristics of Ccs. subspeciosum var. validius and Cos. 
binwn. In size,and shape and in the inner row of single granules it holds with the 
former, in'the character of the’ tumour it inclines {o the latter. It shows that these two 
are forms of one and the same species. 
