Phylum Pyrrhophyta [ 105 



Order 5. Astoma Siebold in Siebold and Stannius Lehrb. vergl. Anat. 1 : 10 ( 1848) . 

 Order Phytozoidea Perty Kennt. kleinst. Lebensf. 161 (1852), in part. 

 Order Flagellata Claparede and Lachmann Etudes Inf. 1: 73 (1858), in part. 

 Order Flagellato-Eustomata Kent Man. Inf. 1: 36 (1880). 

 Suborder Euglenoidina Biitschli in Bronn Kl. u. Ord. Thierreichs 1 : 818 ( 1884). 

 Abtheilung (suborder) Chloromonadina Klebs in Zeit. wiss. Zool. 55: 391 



(1893). 

 Order Euglenoidina Blochmann Mikr. Tierwelt 1, ed. 2: 50 (1895). 

 Subclasses Chloromonadineae and Euglenineae Engler in Engler and Prantl 



Nat. Pflanzenfam. I Teil, Abt. la: v, vi (1900). 

 Orders Euglenales and Chloromonadales Engler Syllab. ed. 3: 7 (1903). 

 Orders Eugleninae and Chloromonadinae Pascher Siisswasserfl. Deutschland 1 : 



29 (1914). 

 Orders Euglenida and Chloromonadida Calkins Biol. Prot. 283, 285 (1926). 

 Mostly solitary flagellate cells of fresh water, unwalled and capable of contraction 

 and writhing movement; the anterior end of each cell (in the flagellate condition) 

 penetrated by a pit, the reservoir or cytopharynx, into which contractile vacuoles 

 open; having one flagellum, or two, usually unequal, or more, one flagellum of each 

 cell usually being stichoneme; mostly producing a solid storage product, not staining 

 blue with iodine, called paramylum. 



Jahn (1946) reviewed this group. He recognized four families, to which one 

 more, to include the chloromonads, is to be added. 

 1. Producing paramylum. 



2. Flagellum with a swelling near the base, 

 usually single but formed of two parts 

 which join below the swelling; cells 

 mostly pigmented. 



3. Non-motile and walled in the vege- 

 tative condition Family 1 . Colaciacea. 



3. Flagellate in the vegetative con- 

 dition Family 2. Euglenida. 



2. Flagellum not swollen and usually not 

 forked near the base; cells not pig- 

 mented. 



3. Cells without internal rod-shaped 



structures; flagella stichoneme Family 3. Astasiaea. 



3. Cells with internal rod-shaped struc- 

 tures; flagella acroneme or simple Family 4. ANisoNEMroA. 



1. Not producing paramylum, storing oil Family 5. Coelomonadina. 



Family 1. Colaciacea [Colaciaceae] Smith Freshw. Alg. 617 (1933). Family 

 Colaciidae Jahn in Quart. Rev. Biol. 21: 264 (1946). Euglenoid organisms which 

 are walled and non-motile in the vegetative condition. There is a single genus 

 Colacium, producing dendroid colonies. 



Family 2. Euglenida Stein Org. Inf. 3, I Halfte: x (1878). Family Euglenina 

 Biitschli in Bronn Kl. u. Ord. Thierreichs 1: 820 (1884). Family Euglenaceae 

 Engler in Engler and Prantl Nat. Pflanzenfam. I Teil, Abt. 2: 570 (1897). Solitary 

 motile cells, mostly with abundant green plastids, the flagella with swellings near the 

 base, mostly solitary and forked below the swelling. Jahn recognized twelve genera. 

 Eutreptia has two flagella; Euglenamorpha has three. Members of the latter genus 



