342 FRESHWATER ALG^ OF LIS]MORE DISTRICT^ 



numero circ. 200, diam. max. 50-60, cell. diam. 34-36, membr. 

 s.sp. circ. 3, spin. long, ad 8 /x. 



Lismore(260, 261). 



V. ylohator is only a little less rare in the district than V. 

 aureus. The cells, of the specimens I have noted, did not show 

 as distinctly stellate as the European forms, and as figured in 

 Overton, Gatt. Yolvox, T. i., f . 4, rather than in Klein, Gatt. 

 Volvox, 1889, T.X., f.2, or in Janet, Le Yolvox, p.39, f.3. The 

 connecting filaments (for they can hardly be termed arms) are 

 very faint and indistinct, and not more than 1 /x thick, hj^aline; 

 while the cells are very irregular in outline, but apparently more 

 compact than in European specimens, and rather closely packed. 

 The chloroplast is sometimes pale yellow-green, but just as often 

 the same pale green colour as in V. aureus. The oospores are 

 yellow or green, with a hyaline integument consisting of an inner 

 and an outer membrane separated by a mucous zone, the outer 

 membrane covered with conical spines somewhat longer and more 

 pointed than generally figured. 

 Var. AUSTRALis, n.var. 



Coenobium cellulis a vertice visis insequaliter polygoniis, den- 

 sissime ordinatis indiciis filorum solis cernendis; cellulis a latere 

 (sectione opticali) ylohosis. Chloroplastides dilute virides. 



Ccen. diam. 500; cell. diam. 3-4, vel 4-6, inter se distant. 1 //. 



Lismore (261). Cum priori. 



This form is almost indistinguishable from V. tertius var. 

 tessellata; the cells are of the same colour, globose in sideview, 

 very closely packed, almost touching in places, and the connect- 

 in 2 strands are absent. The cells, seen from above, however, 

 are, in this variation, a little more irregular in outline, and here 

 and there, at the angles, a slight point indicates the position of 

 the missing filaments. 



VoLvox LiSMORENSis, n.sp. (PI. xUv., f. 7, 8.) 



Cellulse a vertice visse inaequaliter polygonise nee stellatse, filis 



tenuissimis, ssepe inter se reticulatis, conjunctse; stigmate rubro 



distincto. Cellulae a latere ut in V. globatore, pyramidales, a 



tergo psene planae, angulis lateralibus productis, filis tenuissimis 



