BY G. I. PLAYFAIR. 311 



for the district additional to those from the river occupy the 

 third column, and the fourth shows the totality of the forms 

 recorded from the Lismore district. As the latter, for the pur- 

 poses of this paper at any rate, is all included within a circle two 

 miles in diameter, I think the grand total of 512 may be con- 

 sidered indicative of a very rich area. 



Samples.-'SosA76-\78, 186-188, 190-193, 195-197, 201, 225, 

 are out of weeds in the river or creeks; 185, 240, swamp on 

 Woodlawn Road; 223, 241, 260, 261, lagoon behind Foley's; 227, 

 ditto at Woodburn; 236, 237, 259, ditto near North Lismore 

 Station; 238, 254, 255, 258, ditto near Cemetery, Goolmangar 

 Road; 233, rainwater pools, Woodlawn Road; 242, 243, ditto 

 near Girard's Hill; 244, 246, 251, ditto near Drill Hall; 245, 247, 

 ditto in Conway Street; 248, 249, ditto on Wyrallah Road; 

 250, ditto near Convent; 253, ditto North Lismore. The follow" 

 ing are in the form of mucous strata : 202, river-bank, Coraki; 

 199, 208, open drain. Keen Street; 206, on curbstone at Nisbet's; 

 207, open drain near Cathedral; 211, 221, 228, 229, 232, ditto 

 in Carrington Street; 226, ditto in Terania Street; 231, 252, ditto 

 near Presbyterian Church; 210, on zinc-footwasher; 205, 209, 

 horse-trough near Post Office; 212, ditch in Conway Street; 213, 

 230, ditch in Magellan Street; 256, 257, on rocks. New Cut.* 



ChlorophycecE.— There is the same extraordinary dearth of 

 Protococcacece in the swamps and lagoons of the district as in the 

 river-system, in striking contrast to their prevalence round Syd- 

 ney, where I have obtained them in such quantities as to make 

 the water, in which they were, quite gelatinous. All the usual 

 genera, however, were observed. On the other hand, the Volvo- 

 cacece are well represented and plentiful (in the rainy season 

 especially), as was the case also ^with the green flagellate in- 

 fusoria. Out of a total of 82 forms of Chlorophyceoi noted, no 

 less than 31 (or nearly 40%) belong to the VolvocacecE, represent- 

 ing nine genera, viz., Carteria, Chlamydomonas, Phacotus, Ptero- 

 monas, Gonium^ Pandorina, Eudorina, Volvulina gen.nov., and 

 Volvox. Indeed, the predominance of the green flagellates (both 



*The numbers, 176 to 261, correspond to samples preserved in the 

 National Herbarium, Botanic Gardens, Sydney. 



