BY G. I. PLATFAIR. 343 



conjunctse, stigmate ad apicem. Chloroplastides luteo-virides, 

 pyrenoidibus nullis visis. 



Coen. diam. 790; cell. diam. 8, inter se distant. 20 /x. Coen. 

 filial, diam. 215-275, cell. diam. 6, inter se distant. 2 {x. 



Lismore (250). 



This species resembles V. glohator in the colour of the chloro- 

 plasts, and in the shape of the cells in optical section. From 

 above, however, the cells are not stellate, but only irregularly 

 polyhedral, with a minute point at the angles sometimes. They 

 are connected by extremely delicate threads, much more delicate 

 than in F. aureus^ sometimes hardly visible. Generally, the 

 threads are double, rarely triple, and, instead of running directly 

 between the cells, they have a habit of anastomosing with one 

 another. 



Var. GLOBULIFERA, n.var, (PI. xliv., f.9.) 



Coenobium cellulis a vertice inaequaliter polygoniis, filorum 

 indiciis solis raro cernendis; cellulis a latere glohosis. 



Coen. diam. 290-500; cell. diam. 7-8, inter se distant. 6-20 fx. 

 Coen. filial, diam. 150, cell. diam. circ. 8, partic. ultim. circ. 3 /x. 



Lismore (250). Cum priori. 



The cells, from above, are irregularly polygonal, with the angles 

 occasionally drawn out a little; here and there, but only rarely, 

 one of the very delicate filaments might be noted. In sideview, 

 the cells are globose. A figure (PI. xliv., f.9) is given of the 

 surface of one of the daughter-coenobia; the cells were large, 8 /a 

 in diameter, and indistinctly outlined with smaller cells of many 

 shapes and sizes between. The large cells seemed to be frag- 

 menting into 4-6 smaller cells, 3 /x in diameter — the ^^ partic. 

 ultim "^ supra. 



Genus Hydrodictyon Roth. 

 Hydrodictyon reticulatum (L.) Lag. 



Cell. long. 200, lat. centr. 32, ap. 40 /x. 



Lismore (255). 



Genus Inepfigiata W. &G. S. West. 

 Ineffigiata neglecta W. & G. S. West. 



Small pieces, up to diam. 90 /x, plentiful, of a brownish- or 

 yellowish-green colour. 



