Source : Isolated from antelope dung from Africa; found later by Thaxter on deer dung from the Philippines and Florida. Baur (Arch. f. Protistenkunde, 5, 1905) found it on rabbit dung near Berlin, and Kofler (Sitz- ber. d. kais. Akad. wiss. Wien, math.-nat. Klasse, Abt. I, 122, 1913) reports it from the same source near Vienna. Habitat: Found on decaying organic mat- ter in soil and in the dung of various ani- mals. Illustrations: Thaxter {op. cit., 1897, PI. 30, Figs. 1-15), Quehl (Cent. f. Bakt., II Abt., 16, 1906, PI. 1, Figs. 13 and 14), Jahn (Beitrage zur bot. Protistologie. I, Die Polyangiden. Gab. Borntraeger, Leipzig, 1924, 199, Fig. 5) and Kuhlwein (Arch. Mi- krobiol., 17, 1952, 403 (best)). 6. Chondromyces pediculatus Thax- ter, 1904. (Bot. Gaz., 87, 1904, 410.) pe.di.cu.la'tus. L. dim. noun pediculus a small foot (stalk); M.L. adj. pediculatus having a small foot or stalk. Vegetative cells: Rods 0.6 to 0.7 by 2.0 to 4.0 microns. Fruiting bodies: Cysts rounded to bell- shaped, truncate at distal end, orange-j^el- low; when drj% orange-red, 35 to 50 microns. Sessile on stalks 40 to 60 microns in length which are arranged as an umbel on the tip of the stalk. Stalk 300 to 700 microns in length, solitary, simple, usually rather slen- der and somewhat wrinkled. Source: Isolated from goose dung from South Carolina. Habitat: Found in the dung of various animals. Illustrations: Thaxter {ibid., PL 26, Figs. 7-13). 7. Chondromyces medius Krzemieniew- ski, 1930. (Acta Soc. Bot. Poloniae, 7, 1930, 263.) me'di.us. L. adj. medius medial, mod- erate. Vegetative cells: Tapering rods, 0.6 to 1.0 by 4.5 to 9.2 microns. Nearly colorless in mass. Fruiting bodies: Reddish orange cysts becoming light brown, attached to the stalk by pedicles about 40 microns long. Cysts 28 to 87 by 32 to 94 microns, variable in shape, predominantly flattened at the base, some- times narrowing and elongated. Resting cells in cysts 0.7 to 1.2 by 3.5 to 5.0 microns. Source: Isolated from soil from Poland; also found on a fungus in Panama. Illustrations: Krzemieniewska and Krze- mieniewski {ibid., PL XVII, Figs. 20-22; also see Bull. Intern. Acad. Pol. Sci. Lettres, No. 1-10, S6rie B (I), 1946, PL 1, Figs. 11- 13). 8. Chondromyces catenulatus Thax- ter, 1904. (Bot. Gaz., S7, 1904, 410.) ca.te.nu.la'tus. L. noun catena chain; L. dim. noun catenula a small chain; M.L. adj. catenulatus having small chains. Vegetative cells : Cultivated only on origi- nal substrate. Rods 1.0 to 1.3 by 4.0 to 6.0 microns. Fruiting bodies: Cysts light yellow- orange, 18 by 20 to 50 microns in rosary-like chains which may be branched once or twice, sessile on a short, compact stalk, cysts sepa- rated by shriveled isthmuses. Chains up to 300 microns. Stalk simple, 180 to 360 mi- crons, cleft above and passing over into the chains, rather broad at the base and spread- ing somewhat on the substratum. The di- visions of the stalk are pointed, short and slightly swollen. Source : From decaying poplar wood from New Hampshire. Illustrations: Thaxter {ibid., PL 26, Figs. 1-5). FAMILY V. MYXOCOCCACEAE JAHN, 1924. (Beitrage zur bot. Protistologie. I, Die Polyangiden. Geb. Borntraeger, Leipzig, 1924, 84.) Myx.o.coc.ca'ce.ae. M.L. mas.n. Myxococcus type genus of the familj^; -aceae ending to denote a family; M.L. fem.pl.n. Myxococcaceae the Myxococcus family. The rods become shortened when fruiting occurs and develop into spherical or ellipsoidal
