68 ZYGNEMATACEAE 



globose bodies; reproduction by zygospores and parthenospores en- 

 closed by sporangial walls; conjugation scalariform and lateral; zygo- 

 spores compressed-globose or subglobose, 29-38/1. x 22-25/1; median 

 spore wall yellow to brown, sharply scrobiculate on the faces, only 

 slightly scrobiculate or striate near the prominent equatorial suture; 

 parthenospores without prominent suture. (PI. XII, Figs. 1-5.) 

 China, Nanking and Chungking. 



11. Zygogonium exuvielliforme Jao 1935. Amer. Jour. Bot. 22, 



p. 768. 



Vegetative cells 13-22^ x 48-105/i.; chromatophorcs 2; conjugation 

 lateral and scalariform; spores formed in the greatly enlarged conju- 

 gating tubes; zygospores compressed-globose with distinct or prom- 

 inent sutures, 35-42/1 x 38-54 /a in diameter; median wall yellow to 

 brown, thick, lamellate, with scattered pits except near the equatorial 

 suture. (PI. XII, Figs. 6-8.) 



South America, Colombia, Lake Macotama at 14,400 feet altitude. 



12. Zygogonium plakountiosporum Jao 1935. Amer. Jour. Bot. 



22, p. 767. 



Vegetative cells 16-22/i. x 30-155M, with 2 chromatophorcs close to 

 the nucleus; conjugation lateral and scalariform; tubes greatly dis- 

 tended containing the spores; zygospores compressed-globose with 

 colorless outer wall; median wall brown, with equatorial suture more 

 or less prominent, and with arching ridges forming a zone of pits on 

 one side of the suture; spore dimensions 35-41 /^ x 40-68 ju. x 14-20 /i. 

 (PI. XII, Figs. 9-11.) 



South America, Colombia, Lake Macotama at 14,400 feet altitude. 



This species is remarkable for its asymmetrically ornamented spores. 



13. Zygogonium indicum (Randhawa) Transeau. nom. nov. 



Proc. Indian Acad. Sci. 8, p. 140 (as Zygnema heydrichii 

 var. indicum Randh.). 



Vegetative cells 18-22 /a x 50-90 /a, with 2 chromatophorcs near the 

 nucleus; conjugation usually lateral, rarely scalariform; zygospores 

 ovoid 22-27 /i. ^ ^i~S7/^' median wall greenish-blue to dark blue; scro- 

 biculate with pits about 2/1 in diameter; parthenospores smaller and 

 similar. 



India, Fyzabad, U.P., March 12, 1938. 



This species is placed in the genus Zygogonium because the spore is 

 separated from the gametangia by a wall. In appearance it resembles 

 Zygogonium heydrichii, a species having yellow spores. 



