32 THE GENUS TRACHELOMON AS^ 



Var. GiRARDiANA, n.var. (PL v., f.7, 8). 



Lorica corpore a latere subhexagono, a vertice eirculari; lateri- 

 bus objectis parallelis, planis vel interdum levissime retusis; collo 

 modo brevi, ore obliquo, modo longo recto truncate, ore minute 

 denticulato. Membrana aspera. 



Long. 38-57, lat. 22-26; coll. alt. 4-6, lat, 6-8; caud. long. 16 fx. 



Lismore 242. 



There is some doubt whether this form should be placed under 

 Tr. urceolata, as it comes from a different part of the country, 

 and the membrane is distinct. The latter is irregularly and 

 minutely rough, due probably to depressed scrobiculations, as in 

 Tr. scahra, supra Obtained from swampy ground at the foot of 

 Girard's Hill. 



Trachelomgnas elkgantissima (G. S. West) mihi. 

 Syn. Di7iohryoii eleyaiitissimum G. S. West, Yan Yean Res., 

 p. 82, fig. 1 OK; Track caudata var. elegantissima Playf., Sydney 

 Water Supply, p. 54 6. 



From the figure of T7\ caudata given by Stein 

 in his Naturgeschichte der Flagellaten, a copy of 

 which has lately come into my hands, it appears / \ y. 

 that there are too many points of difference for V / ^- 9^ 

 this form to be conveniently arranged as a varia- . \ / T;, § 4i 

 tion of Tr. caudata (Ehr.) Stein. I have made it, j — .2 o 

 therefore, a separate type. West's dimensions 

 are -.—Long, (sine stip.) 34; long. stip. 28; lat. max. 

 13, lat. coll. 4, lat. oscul. 7*5 /x. 



Var. OVATA, nom.nov. (PI. v., f.9). 



Minor quam forma typica, corpore ovato, superne rotundato, 

 inferne acuminato lateribus psene planis ad stipitem convergenti- 

 bus; collo quadrato, lateribus parallelis, ore everso. 



Long. 38, lat. 9 /x. 



Sydney Water screenings. 



Syn. Track, caudata var. elegantissima Playf., I.e., P1.57, f.lL 

 The Victorian form, which I have not yet noted here, is some- 

 what different in shape from mine; I am, therefore, describing 

 the latter as a variation. 



