FAMILY I. CYTOPHAGACEAE 863 



of yeast extract and ferric phosphate. Good species that apparently belong here, the 



growth on broth of this composition was majority of which attack cellulose: Verona 



also obtained. Apparently the yeast extract (Rendiconti R. Accad. Naz. d. Lincei, 19, 



supplied necessary growth substances. Ser. 6a, 1934, 731), Imsenecki and Solntzeva 



Source: Isolated by streaking a piece of (Bull. Acad. Sci., U.S.S.R., Ser. Biol., No. 



Dictyota dichotoma on agar containing 0.2 6, 1936, 000), Verona and Baldacci (Myco- 



per cent potassium nitrate. pathologia, 2, 1939, 135; also see Boll. R. 



Habitat: From seaweed. Beaufort, North 1st. Patol. d. Libro, 1, 1939, 8 pp.), Soriano 



Carolina. (Rev. Argentina de Agronomia, 12, 1945, 



125), Pringsheim (Jour. Gen. Microbiol., 



NOTE: Species incertae sedis. In recent 5, 1951, 145) and Kadota (Bull. Japanese 



years at least fourteen additional species Soc. of Sci. Fisheries, 19, 1953, 476). Some of 



have been placed in the genus Cytophaga the organisms described were found in soil 



or in other genera that appear to duplicate or humus, while others were found to cause 



this genus. For example Stapp and Bortels deterioration of paper or stored fish nets; 



(Zent. f. Bakt., II Abt., 90, 1934, 28) have still others were found in the intestines or 



described five new species of Cytophaga from feces of termites. Comparative studies must 



the humus of forest soils. Similarly, the fol- be made before the true relationships of 



lowing authors have described unicellular these .species can be determined. 



FAMILY II. ARCHANGIACEAE JAHN, 1924. 

 (Beitrage zur bot. Protistologie. I, Die Polyangiden. Geb. Borntraeger, Leipzig, 1924.) 



Ar.chan.gi.a'ce.ae. M.L. neut.n. Archangium type genus of the family; -aceae ending 

 to denote a family; M.L. fem.pl.n. Archangiaceae the Archangium family. 



The resting cells are shortened rods, never enclosed in larger cysts. The fruiting bodies 

 are irregularly swollen or twisted, or are finger-like structures. 



Key to the genera of family Archangiaceae. 



I. Fruiting body depressed, usually irregularly delimited, the interior usually consisting 

 of swollen or intestine-like twisted or inter-twined masses, whose windings may be 

 constricted or may jut out (project) as free ends. 



Genus I. Archangiurti, p. 863. 

 II. Fruiting body consists of single (separate) columnar or finger-like structures arising 

 from the substrate. 



Genus' II. Stelangium, p. 866. 



Genus I. Archangium Jahn, 1924. 

 (Beitrage zur bot. Protistologie. I, Die Polyangiden. Geb. Borntraeger, Leipzig, 1924, 67.) 



Ar.chan'gi.um. Gr. noun arche from the first, beginning; Gr. noun angium a vessel, re- 

 ceptacle; M.L. neut.n. Archangium primitive vessel. 



The mass of shortened rods embedded in slime forms a pad-shaped or more rounded, 

 superficially swollen or tuberous fruiting body, even with horny divisions. The fruiting 

 body has no membrane. In the interior can be seen a mass resembling coiled intestines. The 

 windings of this coil may be uniform, or irregularly^ jointed, free or stuck together; the ends 

 may be extended and horny. Instead of a membrane there may be loosely enveloping slime. 



The type species is Archangium gephyra Jahn. 



Key to the species of genus Archangium. 



I. No slimy capsules. 



A. Fruiting body usually wound, irregularly constricted, sometimes swollen and vesicu- 

 lar, appressed. 



