58 ZYGNEMATACEAE 



23. Zygnemopsis pectinata (Fritsch) Transeau 1934. Trans. 



Amer. Micros. Soc. 53, p. 216. Ohio Jour. Sci. 25, p. 198, 

 Figs. 38-44. 1925. 



Vegetative cells 36-42 ^ x 83-200 ju-; chromatophores 2, stellate or 

 elongated stellate, each with a pyrenoid or rarely 2 or 3 pyrenoids; 

 zygospores unknown; akinetes swollen toward the middle to 80 m, with 

 walls 6-8 /i thick, sometimes obliquely ventricose, alternating in succes- 

 sive cells; aplanospores ellipsoid, or with polar thickenings, 70-94 ^ x 

 ioo-i28iit; outer spore wall 4-8^1 thick, smooth; median spore wall 

 irregularly granulose. (PI. IX, Figs. 18-21.) 



South Africa, Kentani District. 



The specimens upon which this description is based have an amazing 

 variety of chromatophores only illustrated in part in the publication of 1925. 

 None of the spores examined is believed to be fully mature. 



24. Zygnemopsis hodgettsii Transeau 1934. Trans. Amer. Micros. 



Soc. 53, p. 216. Hodgetts. Trans. Roy. Soc. S. Africa. 13, 

 p. 67. 1925. 

 Vegetative cells 35-50 ju- x 20-75 yu, ^^ diameter, with 2 stellate chro- 

 matophores; zygospores unknown; aplanospores ovoid, 40-55^ x 

 65-8ojLi, immature. (PI. IX, Fig. 22.) 

 South Africa, Stellenbosch. 



This and the 2 preceding species are obviously imperfectly described 

 species, but have characteristics that clearly place them in this genus, and 

 not in the genus Zygnema. 



List of the Species of ZYGNEMOPSIS with Number 



americana Transeau 1934 8 



cokimbiana Transeau 1934 7 



decussata Transeau 1934 20 



desmidioides (W. & G. S. West) Transeau 1934 6 



jertilis (Fritsch & Rich) Transeau 1934 22 



floridanu Transeau 1934 4 



gracilis Randhawa 1938 3 



hodgettsii Transeau 1934 24 



indica Randhawa 1937 11 



iyengarii Randhawa 1937 15 



lamellata Randhawa 1937 18 



7ninuta Randhawa 1937 5 



orientalis (Carter) Transeau 1944 2 



pectinata (Fritsch) Transeau 1934 ^3 



