18 PROCEEDINGS OF THE AMERICAN ACADEMY 



Other species on the same host. It is to be distinguished from 

 D. occulta (type) by its method of germination. It is without doubt 

 more widely spread, but the distortion is probably mistaken for the 

 work of an insect rather than that of a fungus. 



Species Inquirendce. 



10. D. Cotnari, (B. & Br.), De Toni. 

 On leaves of Comaram palustre. 

 England. 



11. D. punctif or mis, ^ 'inter . 



On leaves of Lythrum hyssopifolium. 

 Australia. 



12. D. Lijthropsidis, Lagerh. 

 Od Lythropsi s peploides. 

 Portugal. 



Species Excludendoe. 



D. Niesslii^ De Toni. 



D. Limosellce, (Kunze), Schroeter. 



D. decipiens, Winter. 



D. Alismatis, Hark, (not Coruu). 



EURRILLIA, gen. nov. 



Sorns compact, not separating into its elements on being crushed. 

 Central portion composed of an irregular mass of parenchymatous 

 tissue. Spores closely resembling those of Entyloma^ both in structure 

 and in germination, compacted into several dense rows. Corte x none 

 or composed only of a thin, irregular ayer of hardened hyphai. 



B. pustulata^ sp. nov. Spots irregularly orbicular, often confluent, 

 light yellow, chiefly hypophyllous. Sori elongated ellipsoidal, at length 

 bursting through the epidermis, which appears raised in small blisters, 

 200-350 /A by 150-180 /a, light brown. Spores not separable at ma- 

 turity, almost globular, 4-6 jx in diameter, germinating while the 

 sori are in position. Promycelium cylindrical, IS/x. long, bearing 4-5 

 sporidia in a whorl at the blunt apex. Sporitlia slightly bent, 

 1 6 /x by 3 /x. 



On leaves of Sagittaria variabilis. 



United States ! (Illinois, leg. G. P. Clinton !, comm. T. J. BurriU, 

 Wisconsin, W. Trelease !). 



The sori of this species resemble in structure the spore balls of 

 Testicularia Cyperi, Klotsch. ; * but the position of that species is un- 



* Cf. Cornu, Ann. Sci. Nat.,ser. 6, Tom. XV. pp. 270-273, PI. XIV. Fig. 1-5, 

 1883. 



