350 FRESH-WATER ALG.E. \Chloros]}erMeoi. 



dark greeii^ the vesicles were abmidant^ and the fiLaments 

 fine. ' 



BATRACllOSPERMUM, Bory. 



Gen. Char. Filaments invested with gelatine, monihforiu, 

 branched. Truit, globules of dense filaments scattered through- 

 out in whorls, and to which they are attached by a single fila- 

 ment. — The name is composed of two Greek words, signifying 

 frog-spmcn. 



1. Batrachospermum monilieormEj Bory. (Plate XX. 

 fig. 77, filaments of B. moniliforme, and on the left a por- 

 tion of moniliform filament,, magnified.) 



Hab. In pure water, in wells and fountains and gently 

 flowing streams. Not very common. Mr. Ralfs, Devon- 

 shire ; Mr. Ilassall, Cheshuut ; Dr. Dickie, Aberdeen ; Dr. 

 Greville, near Edinburgh ; Mr. Kcddie, Dunollybeg, near 

 Oban ; D. L., Ballantrae. 



The specimens I got at Ballantrae were as fine as any 1 

 had ever seen. They filled a little fountain of water on a 

 hill-side near the sea-shore. AYhcn brou<]!:ht out in liand- 

 fulls from the little spring well, they were truly loathsome, 

 or at least they would have been so to a person unac- 

 (juainted with them, for they greatly resembled frog-spawn. 



