198 
C. lunula var. maximum Borge. 
Forma cellulis 153- 185 // crassis, diametro 5 — 6-plo 
longionbus., dorso non tam valde convexo quam in forma 
brasiliensi, ventre fere recto vel plus minus tumido; apici- 
bus latere superiori non concavis. 
Enoggera. 
C. parvulum Nag. 
• Upper Walsh River County: Stannary Hills. 
Pleurotaenium (Näg.) Lund. 
P. cristatum (Turn.) Borge. 
Forma Borge Trop. Süssw.-Chloroph. p. 15, t. 1, f. 11. 
Long, semicell. 218—220 lat. ad. bas. 29—30 ad apic. 
26 fi, infra apic. 22 
Barrow River. 
P. ehrenbergii (Bréb.) De Bar. 
Upper Walsh River County: Stannary Hills; Barrow 
River. 
— — var. elongatum West. 
Barrow River. 
P. ovatum Nordst. 
Barrow River. 
P. stuhlmannii (Hieron.) Schmidle. 
Forma Borge Desm. erst, regnellsch. Exp. p. 83, 
t. 2, f. 5. Lat. max. semicell. 61 — 62, s g, lat. apic. 49,5—52 //. 
Barrow River. 
Cosmarium Corda. 
C. angulatum (Pertv) Rab. 
Forma major angulis omnibus semicellularum rotun- 
datis, isthmo angustiore; pyrenoidibus binis. Long. cell. 
76—77 //, lat. 44 //, crass. 28, s — 29 //; lat. isthm. 17 lat. 
apic. cire. 20 ft. Fig. 1. 
Barrow River. 
Die Form scheint von der f. major Grün. Ins. Bank 
p. 15, t. 2, f. 24 nur durch etwas grössere Dimensionen ab- 
zuweichen sowie dadurch, dass die Zellenden nicht konkav 
