Unter 93 verzeichneten Arten finden sich 23 nov. 
sp., mehrere neue Formen und einige neue Varietäten. 
C. orthostichum nov sp. 
C. submedioere, paullo longius quam latius, profunde 
constrietum, sinu angusto lineari; semicellule subelliptics, 
utroque fine late rotundate, margine ventrali et medio 
dorsali recto, granulate, granulis in series 7 8 rectas*) 
verticales ordinatis; a vertice vis® elliptice, granulate, in 
centro punctat® granulis nullis; a latere vis® circulares. 
Latitudo isthmi triens diametri transversalis corporis. 
Crassitudo dus partes longitudinis cellule. Nuclei amylacei 
singuli. 
Long. 0,00134—142° — 34—36 u; Lat. 0,0012—13“ 
30—33 u; Crass. 0,00094” — 24 u; Lat isthmi 0,00043 
11 u. 
%. pumilum nov, var. 
Var. subduplo minor, tam longa quam lata, dorso leviter 
latissimeque convexa, granulis series 6 verticales et 3 hori- 
zontales efficientibus. 
Long. 0,00085 = 21,5 u; Lat. 0,00079° = 20 u; 
Crass. 0,00055” — 14 u; Lat. isthmi 0,0003 —= 8 u. 
C. Quadrum nov. sp. 
C. submagnum, cireiter tam longum quam latum, pro- 
funde constrietum, sinu lineari angusto, subquadratum, apice 
utroque levissime retusum, lateribus subrectis, angulis latissime 
rotundatis, a latere visum utroque polo valde rotundatum, 
medio utrimque late excavatum; semicellule basi recta inter 
se contigux, angulis inferioribus subreetis, margine laterali 
crenato, dorsali dense erenulato; a vertice vise oblongs. 
Membrana dense verrucosa, verrucis fere in quincuncem 
ordinatis, series et longitudinales 17 rectas et oblique trans- 
versales paullum arcuatas efficientibus, in medio cellule a 
vertice vise minoribus. Crassitudo corporis circiter dimidium 
diametri longitudinalis. Nuclei amylacei bini. 
Long. 0,00287—307' —= 73—78 u; Lat. 0,00276— 284‘ 
— 70-72 u; Crass. 0,0015 —158 — 38—40 u; Lat. isthmi 
0,00114” — 29 u. 
C. trachypleurum nov. sp. . 
C. mediocre, diametro quarta parte longius, profunde 
constrietum, sinu intimo lineari angusto, extremo ampliato; 
I 
semicellulse subreniformes, medio dorso truncatz et nude, 
intra marginem exteriorem et in ipso margine utroque laterali 
*) Inde nomen specificum (öedog — rectus; driyog — 
series vel ordo). 
