276 ZYCNFAfATACEAE 



PLATE XVI 



MOUGEOTIA 



Fig. I. — A/, pulchclla, vegetative cell and zygospores from Douglas 

 Lake, Michigan. Figs. 2-4. — M. robusta, vegetative cells, zygospores, and 

 gametangia Irom Winchester, Massachusetts. A cell in which the chro- 

 matophore has divided completely with the nucleus between the halves is 

 represented in Fig. 4. One not infret]uently Hnds chromatophores ot this 

 and a few other species with ends cleft to various depths. Fig. 5. — .V/. day- 

 tonae, zygospore and gametangia from Daytona, Florida. Fig. 6. — M. 

 handelii, zygospore, gametangia, and vegetative cell from Yiinnanfu, China. 

 After Skuja. Fig. 7. — M. sanjordiana, from Daytona, Florida. Fig. 8. — 

 M. oblongata, a pair of zygospores with attached gametangia from Fort 

 Myers, Florida. Figs. 9-11. — M. laetevirens, two forms of zygospore and 

 an aplanospore from Long Island, New York. Fig. 12. — M. varians, zygo- 

 spore from Sweden. After Wittrock. Figs. 13-15. — M. opelousensis, three 

 zygospores seen at different angles, from Opelousas, Louisiana. After Taft. 

 Fig. 16. — A/, angolensis, zygospore from Angola, Africa. After West. 

 Fig. 17. — M. gelatinosa, zygospore wifh pectic sporangium wall from 

 Sweden. After Wittrock. 



