82 



LHIZOPODAN FAUNA OF A BRISBANE LAGOON. 



List of species observed: — Amoeba proteus Ldy.^, 

 A. radiosa Ehr., Arcella artocrea Ldy., A. discoides Ehr., 

 A. mitrata Ldy., A. vulgaris Ehr., Centropyxis aculeata 

 Stn., C. ecornis Ldy., Difflugia corona Wallich (spined), 



D. corona Wallich (spineless), D. leidyi Wailes., D. lobostoma 

 Ldy., D. oblonga Ehr., D. tuberculata Wallich, Euglypha 

 acanthophora Ehr., E. compressa Cart., E. cristata Ldy., 



E. tuberculata Duj., Pareuglyp)ha reticulata Pen., Trinema 

 enchelys Ldy. Total, 19. 



Table of Living Rhizopods Observed. 



The recorded Rhizopodan fauna of this lagoon 

 consists of nineteen species either living or rejjresented 

 by empty tests ; of this number three occur only once, 

 viz. :■ — Difflugia leidyi Wailes (July) ; Euglypha compressa 

 Cart. (Sept.) ; E. cristata Ldy. (May) ; while Arcella artocrea 

 Ldy., A. mitrata Ldy., and A. vulgaris Ehr., are present 

 in every instance. With reference to Arcella it must be 

 mentioned, however, that this genus received special 

 attention. The largest number of living forms is recorded 

 from Maj^, viz., 13., and the least from September, viz., 5> 

 It seems that the large form of Difflugia oblonga Ehr.^ 



