Be 
Long. 0,0026 -31” = 66—80 u; Lat. 0,0024—29" — 60 
- 74 u; Crass (inelus. tumor,) 0,0017 — 44 u; Lat. isthmi 
0,00069 83" — 17,5—21 u. 
C. latifrons nov. sp. 
C. submedioere, tam longum quam latum, quadrangulare, 
modice constrietum, sinu lineari angustissimo; semicellul» 
tetragon®#, duplo longiores quam latiores, e basi recta latius- 
cula subito dilatate, margine subtiliter granulato-dentate, 
dorso leviter latissimeque convexo, lateribus rectis vel 
levissime retusis, aneule superioribus obtusis, inferioribus 
obtusangulis, granulat®, in centro granulis nullis sed tumore 
basali, minus elevato, seriebus granulorum verticalibus 3 
ornato, instruct®; e vertice vis® elliptice, granulat®, sed in 
centro granulis nullis, medio utrimque tumore parvo granu- 
lato praedite; a latere vise fere hexagono-orbiculares. 
Crassitudo cellule dux partes latitudinis. Latitudo marginis 
basalis semicellul® tres partes diametri transversalis corporis 
et latitudine isthmi subduplo major. Nuclei amylacei 
singuli. 
Long. 0,00134—15° = 34—38 u; Lat. — Long.; Crass. 
0,0009” = 23,3 u; Lat. isthmi 0,0006 —= 15 u. 
OÖ. Wittrockii nov. sp. 
C. parvum, tam longum quam latum vel paullo longius 
profunde constrietum, sinu amplo subreetangulo; semicellul® 
subelliptice—semielliptic#, dorso latissime leviterque convex&® 
vel truncat®, utroque fine rotundat#, ventre alte convex#; 
a vertice conspect# late elliptice; a latere vis® circulares. 
Membrana subtiliter granulata, granulis in series longitudi- 
nales, isthmo interruptas ordinatis. Crassitudo eireiter dus 
artes longitudinis cellule. Latitudo isthmi dimidium 
iametri transversalis corporis. Nuclei amylacei singuli. 
Long. 0,0007—86” = 18—22 u; Lat. 0,00059—83" — 
ee e Crass. 0,00048“ —= 12,3 u; isthmi 0,00029—35“ 
= 1,5—J u. . ee 
C. geminatum nov. sp. 
C. parvum, tam longum quam latum, ambitu subqua- 
dratum, profunde constrietum, sinu acutangulo sensim am- 
pliato, semicellule oblong&, utroque fine truncato rotundatee, 
dorso latissime subtruncat®, ventre subconvex®, margine 
exteriore subtiliter granulato-dentat®, ad utrumque polum et 
sub dorso granulate, in centro tumoribus binis minutis 
quadrifidis (quadrigranulatis) et infra eos ad isthmum 
granulis ternis ornat®; a vertice vis® ambitu elliptice, medio 
utrimque verrucis binis emarginatis instruct®, in apice utro- 
E: 
3 
; 
F 
E 
: 
