224 RELATIONSHIPS OF THE COCCACE.E 



achrous, Migula; M. aquatilis, Bolton ; M. aquatilis, 

 Vaughan; M. canescens, Migula; M. concentricus, Zim- 

 mermann; M. cretaceus, Henrici; M. cy clops, Henrici; 

 M. eburneuSj Henrici; M. globosuSj Kern; M. grossus, 

 Henrici; M. Hauseri (Rosenthal), Migula; M. humidus, 

 Migula; M. inconspicuus, Henrici; M. Iris, Henrici; 

 M. lactis, Chester; M. nacreaceus, Migula; M. nivalis, 

 Chester; M. niveus, Henrici; M. odoratus, Henrici; M. 

 odorus, Henrici; M. pannosus, Kern; M. parvus, Migula; 

 M. roscidus, Migula; M. rosettaceus, Zimmermann; M. 

 sordidus, Schrb'ter; M. subcanus, Migula; M. succulentus, 

 Henrici \M. tardus (Unna, Tommasoli), Migula; M. tetras, 

 Henrici; M. tube? xulosus, Migula; M. vesicce, Heim; M. 

 zonatus, Henrici. 



As was the case in the genus Albococcus, motile forms of 

 micrococci have been described by a few observers. The 

 only one in which the phenomenon is well authenticated is 

 the Micrococcus citreus agilis, described by Menge. In 

 this case the motion of the organism was apparently a 

 true movement of translation, and a single flagellum was 

 demonstrated by Loffier's stain. In other respects the 

 organism resembled M . luteus, being a yellow, non-lique- 

 fying form. Three other yellow cocci, M. ochroleucus, 

 Prove, M. nasalis, Hack, and Diplococcus luteus, have been 

 described as motile; but in neither case is the description 

 at all convincing. 



Reference may finally be made to certain organisms, 

 described as micrococci before the advent of the pure- 



