66 One Thousand Objects 



gelatinous stratum. Elliptical cells scattered in the 

 threads. Found in ditches and pools. 



478. CARMICHAEL'S SPH^ROZYGA (Spharozyga Car- 

 michadii). The filaments beaded, tapering at the ends, 

 collected into a gelatinous stratum. Vesicular cells, 

 spherical and ciliated, and the sporangia elliptical. Found 

 on damp soil in salt marshes or in brackish ditches. 

 (PI. VI., fig. 27.) 



479. LITTLE MESOCARP (Mesocarpus parvulus) is a 

 small species of Conferva of rather uncommon occur- 

 rence, which conjugates by cross threads so as to form a 

 kind of network. 



480. WATER-FLOWER CONFERVA (Aphanizomenon flos- 

 aqu(z). The filaments cohere in bundles, and indistinctly 

 septate; joints longer than broad; the sporangia many 

 times longer than broad. Probably not uncommon. (PI. 

 VI, fig. 28.) 



481. CURVED TRICHORMUS (Trichormus flos-aqnce) is 

 found in stagnant ditches, and rises to the surface in 

 large bluish-green gelatinous masses. The filaments are 

 curved and beaded, with larger cells interspersed. 



482. STRAIGHT TRICHORMUS (Triclwrmus rectus). 

 The filaments are beaded and slender, but straight and 

 of a bright green. Vesicular cells reddish. Found in 

 still pools, but not common. (PL VI., fig. 29.) 



483. DITCH RIVULARIA (Rivularia atigulosa). 

 Roundish, gelatinous, and hollow, attached to plants in 

 still waters. The filaments radiate in all directions, 

 inflated at the base, and tapering upwards. (PI. VI., 



fig- 34-) 



484. BLACK RIVULARIA (Rivularia atra). This is a 

 common parasite on Corallina, and on stones, forming 

 little hard balls like shot. The plant consists of dark 

 green, awl-shaped filaments, with a colourless spherical 

 cell at the base. (PI. VI., fig. 39.) 



485. ORANGE WALL CONFERVA (Chroolepus aureus) 

 is found in orange, velvety patches on rocks, trees, and 

 walls. Very common. The irregular filaments are much 

 branched. 



