2O Synopsis of the Bacteria and Yeast Fungi. 



Natural History Society, I have been favoured with specimens of a 

 supposed Alga from his famous garden pond (the home of so many 

 rarities), which I at once recognized to be this species. It occurred in 

 great quantity, floating freely in the water when young, but sinking 

 among the debris at the bottom when old and tattered ; its beautiful 

 peach colour renders it very striking among the green Algae with which 

 it is frequently entangled. It was accompanied by Monas Okanit, 

 Ehrenberg, which appears to be identical with Chromatium Weissii, 

 Perty ; but I could not find any other of the so-called forms of Bac- 

 terium rubescens, described by Lankester as occurring in company 

 with it. TR.] 



V. SARCINA, Goodsir (extended). 



Cells roundish, dividing in two or three dimensions of space. 

 Daughter-cells connected for some time, forming small solid 

 families or plates, which are often again in their turn united 

 to form larger colonies. Families usually consisting of four 

 or a multiple of four cells. 



25. S. ventriculi, Goodsir (Edin. Med. and Surg. 



Journal, 1842, p. 430). 

 Merismopedia Goodsirii, Husem, 

 M. ventriculi, Robin. 



Cells roundish, united in groups of four, eight, sixteen, 

 or a few more, flattened at the points of contact, forming 

 little cubes which are 

 rounded off at the corners. 

 Individual cells reaching 

 4 ft. in diameter; colonies 

 constricted at the parti- 

 tion walls of the cells, 



about ! 3 oo United in thdr tUm tO 



(after Lurssen). form larger masses. Cell- 



contents greenish, yellowish to reddish-brown, not con- 

 spicuously refringent. (Fig. 10.) 



