GENERAL SYSTEMATIC BACTERIOLOGY 325 



Haematococcus. This generic designation of the "red snow" alga 

 was first given by Agardh (1828, p. 45) to the species Haematococcus 

 nivalis. Since that time this name has been frequently used for an 

 algal genus. It is generally now regarded as a synonym of Sphaerella, 

 according to Hazen (1896, p. 238) and West (1904, p. 189). Wille 

 (1903) regards the generic name as valid and as replacing Sphaerella. 



In a different sense the same generic name has been used a few 

 times in bacteriology. V. Babes (1889, p. 81) in describing the causal 

 organism of bovine hemoglobinuria used the phrase (p. 103) "fiir die 

 Krankheit Charakterischen Hamatokokken" and later (p. 106) "Neben 

 dem Haematococcus finden sich," etc. 



The same organism was earher discussed by Babes (1888, p. 692) 

 and according to several authors (Doflein, 1911, p. 815, Eisenberg, 

 1891, p. 271) the name Haematococcus was here first used. A careful 

 examination of the article fails to show that the term is here used. 

 Babes regarded the organism as a bacterial form. 



The name Haematococcus is invalid in bacteriology because of 

 the prior existence of the algal genus of the same name. Further- 

 more no species name seems to have been used, the term as em- 

 ployed by Babes was apparently only as a casual designation. The 

 first use of the term is a strict generic sense seems to have been 

 by Eisenberg (1891, p. 271) with the spelling Hdmatokokkus, and the 

 species H. bovis. This organism is now recognized as a protozoan. 

 The generic name Haematococcus is not valid as a protozoan genus 

 because of previous use. 



Hamatokokkus. A variant of Haematococcus q.v. used by Eisen- 

 berg (1891, p. 271). 



Haemophileae. The name given by Castellani and Chalmers 

 (1919, p. 932) to the second tribe of the family Bacillaceae. Growth 

 in laboratory media is poor, the organism is Gram-negative, grows best 

 on blood media. The single genus is Haemophilus. 



Haemophilus. A generic name (variant of Hemophilus q.v.) used 

 by Castellani and Chahners (1919, p. 933) as the single genus of their 

 tribe Haemophileae. The type species is designated as Haemophilus 

 influenzae (Pfeiffer) Castellani and Chalmers. 



Halibacterium. A generic name proposed by B. Fischer (1894, p. 

 19) to include certain organisms living in salt water, including Hali- 

 bacterium pellucidum (p. 19), H. roseum (p. 19), H. liquefaciens (p. 21), 

 H. polymorphum (p. 25), H. aurantiacum (p. 26), H. rubrofuscum 

 (p. 28), //. purpurium (p. 30). The description of H. pellucidium 

 (p. 22) which may be regarded as the type follows: 



