78 THE MARINE BOTANIST, 



MYRIONEMA STEANGULANS.— RING- 

 LIKE MYRIONEMA. 



^^ Parasitical on Ulvse and Enteromorphae. An- 

 nual. Summer. Forming a small^ dark-brown, 

 dot-like patch on the fiat frond of the Ulva, or a 

 ring'-like collar round the branches of Entero- 

 morplicpr Patches convex, filaments club-shaped, 

 spores on short stalks. 



0. S. M, Leclancherii, On decaying fronds of 

 J?, palmata and Ulva latissima. Annual. Summer 

 and Autumn. Probably common. Torquay and Down 

 Coast. Forms larger and thinner spots than the 

 preceding. Filaments cylindrical, spores on long 

 stalks. 



M, punctiforme. Parasitical on Ceramium ru- 

 hrum.y Chrysymema clavellosa, &c. Patches very 

 minute, at first flat, then globose* Spores very 

 narrow. 



M. clavatum, " On a thin purpHsh crust {Hil- 

 denhrantia rubra ?\ which covers the pebbles at 



