EUPHYCOPHYTA 



6l 



also to the high viscosity of the protoplasm. Some authors beheve 

 that the genus should be separated from the Ulotrichales (see p. 49) 

 but this hardly seems warranted (see p. 308). 



Capsosiphonaceae : Capsosiphon (capso, box; siphon, small tube). 

 Fig. 32 

 The original single species in this genus was at one time included 

 in the genus Enteromorpha, but now two species are known and the 

 characters justify segregation into a separate genus. The cells are 

 arranged in horizontal and longitudinal rows but do not separate off 

 into longitudinal areolae as in Prasiola. Sexual reproduction is 

 vmknown and the plants are probably diploid, reproducing only by 



00 ^Q -r 



^'^'J::^ 1 00 00 00 



Fig. 32 Gemina and Capsosiphon. a=t.s. membrane of Gemma 

 enter omorphoidea; b, t.s. thallus of G. enteromorphoidea; c, cells in 

 surface view, G. enteromorphoidea; d, t.s. G. linzoidea; e, reproduc- 

 tive and vegetative cells of G. linzoidea; f, Capsosiphon aurea ( x 2); 

 g, C. aurea plantling; h, part of thallus of young plant of C. aurea; 

 i, membrane of C. aurea. (After Chapman.) 



