COLEOCH^TE. 217 



The suspicion also may, I think, be entertained, that C. 

 crispata Itself Is but a condition of C. glomerata, changed by 

 the difFerence of Its place of growth — It growing for the 

 most part In still Avater, in deep ponds, and lakes. I have 

 often seen specimens, which it would be Impossible to refer 

 Avith certainty to either species. A specimen of C cajnllaris 

 in the Llnnajan Herbarium, was refcrrible to this species, or 

 condition of one. 



19. COLEOCH^TE 7?rc5. 



Char. " Frond disciforin, apprcssed, parasitic, formed of fila- 

 ments radiating from a centre, generally conjoined. Fila- 

 ments articulated, dichotomously branched, sending forth 

 in all directions from the 2ipper surface of the cells cylin- 

 drical, truncated, lengthened, setigerous sheaths. Endo- 

 chrome green.''^ — Breb. 

 Derivation. From ko\so9, vagina, and X'^^'^Vi ^<^^^' 



1. COLEOCHiETE SCUTATA Brcb. 



Plate LXXVII. Fig. 6. 



Char. Filaments appressed, conjoined, radiating, so as to 

 describe a disciform frond. 

 ^ soluta. — Filaments radiating, prostrate, free. 

 Coleochate sciitata Breb. Description de deux nouveaux 

 Genres d'Algues fliivlatiles, Ann. des Scien. Nat., Jan- 

 vier, 1844, p^. 25. pi. 2. 



Hab. In stagnant waters and ditches, growing on sub- 

 mersed leaves and stems of aquatic plants. Autumn — 

 spring. Near INIanchester: il/r. Sidebotham. Aber- 

 deen : Dr. Dickie. Near Clonmel : Prof. G. J. Allman. 



" I have found this remarkable Alga in many places in 

 the environs of the town of Falaise. It grows closely applied 

 upon the leaves and stems of inundated and in part decom- 

 posed plants. I have gathered it princi])ally upon Sparga- 

 nium nutans, and upon the Potamogdon nutans. Its lenticular 



