530 



NKW AND KARE FRESHWATER ALG^., 



roplasts deep green, parietal, collected at the end of the cell, and 

 containing several pyrenoids. R^eproduction apparently by zoo- 

 gonidia. The plant bears a general resemblance to Protosiphon 

 Klebs, but it does not form a series of t/emmce, nor does the apical 



Text-fig. 7. 



(a) UrndJa terresh'i.^, gen.nov. et sp., (x500); {h, c) tubular form (x 880); 

 id) var. ahnormi.^, n.var., (x.500); (r) akinetes ?, ( x 500). 



cell multiply by division, but seems to be entirely a gonidangium 

 There is also a great likeness to Codiolnm grey avium A.Br., but 

 the latter has a thick cell-wall and a laminated stipes — ^''stipitem 

 elongatum hyalinnm soHdum {gelatina indurata farchi/niy' — A. 

 Braun, Alg. unicell., p. 20, T. i. 



