GENERAL SYSTEMATIC BACTERIOLOGY 343 



Zellen zu 4 oder mehr zu regelmiissigen flachen Tiifelchen vereinigt, farblos 

 oder lebhaft (nicht griin) geffirbt. Von der durch Phycochrom gefiirbten Spal- 

 talgen Gattung Merismopedia Meyen nur durch den Mangel des spangriinen 

 Pigments verschieden. 



One species is included, L. hyalina (Kiitzing) Schroter. 



The genus is included in Thiopedia (q.v.) by Winogradsky (1888, 

 p. 65). De Toni and Trevisan (1889, p. 1049) give Erythroconis 

 Oerst. (1842) as a synonym. Their description of the genus is as 

 fol'ows: "Cocci quaternati in exiplanato, ambitu ijarallelogrammico, 

 ohvolutas laxe consociati. Coccorum divisio in duas directiones." They 

 divide the genus into two sections, one containing sulphur granules, 

 and one not containing them, with four species in the first and two in 

 the second section. Vuillemin (1913, p. 520) regards this genus as a 

 synonym of M crista Van Tieghem 1883. 



Buchanan (1918, p. 468) included this as the first genus of the tribe 

 Thiopedieae with the description: 



Cells united into tetrads, forming flat tubular masses. Contain sulphur 

 granules and bacteriopurpurin. 



The type species is Lampropedia hyalina (Kuetzing) Schroeter. 



Most recent writers have followed Winogradsky and Migula in dis- 

 regarding the genus. It is rejected by Erwin F. Smith (1905). 



Lankoides. A name given by Castellani and Chalmers (1919, p. 

 934) to the ninth genus of the family Eberthcae. Their description 

 is: 



Ebertheae fermenting glucose partially with the production of acid, but no 

 gas; lactose not fermented or only partially, without gas production. Milk 

 clotted. 



Type species. — Lankoides pyogenes (Passet, 1902). 



Later (1920, p. 606) five species are included. 



Leptomitus. A generic name used by Agardh (1824, p. 83) to include 

 "algae" of various types which grew in certain solutions. The generic 

 description given by Kuetzing (1843, p. 154) reads: 



Trichoma arliculatum, in apicem attenuatiwi, ramosum; arliculovaginati. 

 Spermatia lateralia, epispermio pellucido cincta. Ausser den angefiihrten Merk- 

 malen weichen die meisten Arten dieser Gattung auch noch dadurch von Hygro- 

 crocis ab, dass ihre Zellen hohl und ihre Zelleninhalt hiiufig vielkornig (polygon- 

 imisch) ist; er wird von Jodintinctur, die auch hier bei der Untersuchung gute 

 Dienste leistet, braun gefarbt. Die ersten Arten schliessen sich sehr an die 

 letzten von Hygrocrocis an. 



