116 AUSTRALIAN FRESHWATER PDAGELLATES, 



Genus C r y p t o g l e x a Elirenberg. 



(jRYP'iXXiLEXA AUSTRALIS^ Il.Sp. (PI. V.. tig. 18). 



Cellulae late-ovatae, posteiioie latioi'es, paene subglubosae, postice vix 

 aeuminatae, fronte quam levissime tleplanatae. A latere ellipticae. 



Cell. long. 13, lat. 10^. Lismore. 



CrijptoijleHa pigra Elir., the only species hitherto deseiibed, is .shield-shaped, 

 triangular, Ijroadest above antl very pointed below. Cf. Daugeard, op. cit., p. 

 139, L 44; Senn, p. 170, tig. 127b. Our form is very broadly ovate, almost 

 subglobose, widest below, hardly pointed beneath and very sligiitly Mattened above. 

 The usual deep furrow runs down one face. In side view elliptic, slightly 

 pointed below and flattened above. One long ttagellum; stigma to one side of 

 the furrow; chloroplasts laminar, a brilliant green. Very rare. 



(Jryptchjlexa phacoidba, n.sp. (PI. v., tig. 19). 



Cellulae orbieulares, iuferne modiee angustatae, utroijue polo ob sulci 

 extremitates emarginatae; a latere plano-convexae lenticulares. 



Cell. long. 21, lat. 17^. Lismore (351). 



Another very rare form which seems to connect Cryptoglena with Phaeus, 

 for it shows two amylaceous plates, one large and the other small. The general 

 shape in face view is subcircular, a little narrowed below. There is a broad fur- 

 row down the centre, the ends of which show as an eniargination at each pole. 

 The stigma lies to the left of the furrow as usual and there is tiie customary 

 single long iiagellum. In side view the cell seems to be lenticular, plano-convex, 

 showing gibbous where the furrow runs. I have an idea that this is a juvenile 

 form of Phaeus, the furrow being eliminated with growth, the last vestiges of 

 it persisting as the overlap of the two wings above, and the slight tail below; 

 also the central longitudinal ridge in Phaeus triqiieter. Cf. too Phacu.'< •iiiflatiis 

 {infra |. 



Genus C O I. A <; l C M Stein. 



CoLAruM vKSR'ui,<jsv:,M (Ehr.) Stein. (PI. iii., ligs. 2, 3). 



Cell. veg. long. 9 — 15, lat. 5 — ll^u. Motile zooid not noted. 

 Lismore (291, 307). On Cyclops, Macrotliris (EiitoiiKKslraca). 



COLACUM eix)xi;atu.m, n.sp. (11. iii., tigs. 4 — G). 



Cellulae vegetativae cylindraceae, fronte conicae, poslice rotundatae, apici- 

 bus stipite mucosa atlixae. Zoosporae angustae cylindraceae, medio modiee con- 

 strictae, apicibus attenuatis acuminatis; stigmate linear! luteo-fiisco subapicali; 

 vesiculis contractilibus 2 subapicalibus; fltigello singulo, chloroplastidibus dilute 

 viridibus ellipticis. 



Cell. veg. long. 12^23; lat. 5— llju. Zoosp. long. 15—18. lat. 4;^. 



Lismore (291, 294, 31U, 327). 



The vegetative form of C. resiculositm is sliortly ovate, that of C. elon- 

 ijatum is more or less cylindrical, rounded behind and conical in front where it 

 is fixed to the host by a short stalk of almost invisible nuunts. The host is 

 nearly always Cyclops, Macrothrix or some otlier of tiie Entoraostraca. From 2 

 to 4 cells are often found in a clump. What seem to be the zooids of this 

 species are cylindrical, constricted in the middle, attenuate, and pointed at each 



