24 
Form, Schmidle (Borge), Alg. ans Denver, fig. 1, and d Borge 
Subfoss Séty. Alg. Gotl., fig. 1-3; membrane sm mooth. Length of cell, 
25-27 » ; breadth, 18-22 BS breadth of isthmus, 5-6°5 p. 
Hab.: Mitchell River, near Gulf of cai Edwd. Palmer. Frequently 
the two cell halves belonged to different form 
C. Meneghinii, var. goncinnun, Rabh. The following is 
Professor Schmidle’s note :—‘‘ Dimensions, 24-20 ». The upper corners 
(Plate 1 off phoney are slightly, handle ported curved inwards 
X.) 
as hig. the foregoing: At Jenkins’ Quarry, Bundamba, W. J. Byram, in the 
typical for 
C.crenulatum, Neg. Professor Schmidle says :—“The Sie 
observed hie exactly with the figure in Naegeli; Eniz. Alg., Ela 
5 fig. 7 
Hab. : Blackstone, Ipswich, W. J. Byram. 
Cc. phe ee a Nordst. 
Hab.: Jenkins’ Quarry, W. J. Byram ; rare. 
C. subtumidum forma. Professor Schmidle says : ae Bada 
approximates to the form rotunda in Algenflora v. Virn Te 
g.14. The semi-cells are prolonged sideways. — ep need aut 
that the resemblance to Cos. sexangulare, Ld., is great. 
82: 28y.” (Plate IL.) 
Hab.: Blackstone, Ipswich, W. J. Byram ; very ra ks of 
And he adds:—“If I have rightly understood the remar oe ; 
Bérgesen, written in Danish in his Freshwater Alge boing 
t 
C. subtumidum, Nordst. According to shape of cell, dimension® |; 
dition of the membrane, &e. ay is mes related {6 Te ‘Beh 
therefore scarcely ever better classed elsewhere. C. phase? Pe from 
var. achondrum, Boldt., has nothing to do with @. phar well 38 
which it is distinguished by very much larger dimensions . 
absence of the inflation.’ 
al led ngth 
C. nitidulum, De Not. Cells small, nega se nearly nt angles 
and breadth; constriction deep, sinuses narrow near; bas truncate i 
of semi-cells obtusely rounded, sides anced, os roundly Diamett 
viewed from the vertex e! lliptie ; ; from the side, aera i, Uv. § 724 
22-30 mw; length, 25-35 “p.—Wolle’s Desmids 0 the ¥: 
(Plate V.) 
Hab.: Blackstone, Ipswich, W. J. Byram ; rare. 
ey 
