148 THE AMERICAN MONTHLY [May 



istyles, five, fimbriated at their distal ends and all, but 

 the one nearest the left hand budy border; projecting be- 

 yond the posterior marginal seta^ continuous, heavier 

 and longer posteriorly; contractile vesicle located at the 

 centre of the left hand body border; nucleus, two, elon- 

 gate, one in each body half. Size from 1-200 to 1-150 

 inch. Habitat — Old infusion of rose fission petals. 

 Transverse. 



This form was found exceedingly abundant in an old 

 infusion of rose petals, feeding ravenously on the very 

 abundant bacteria. Many of them seemed so gorged 

 with food that they moved about very lazily, affording 

 the v;riter a good opportunity for their observation. 

 The fine inferior frontal stylesand all of the ventral ser- 

 ies were invariably furcated to within almost their 

 origin; bifurcated usually, a few specimens distinctly 

 tri-furcated. In a few specimens the three superior of 

 the frontal series were bifurcated and in some rare in- 

 stances an odd one or two of the marginal series were 

 bifurcated. The distal ends of all of the anal series, for 

 about one fifth of their length, were distinctly and uni- 

 formally fimbriated. 



Supplementary Note Upon Actinomonas Primus. 



An infusorian somewhat similar to this form is de- 

 scribed by Dr. Gruber under the title of Dimorpha mutans.* 

 In its fiagellate condition, the D. mutans resembles a 

 Heteromita, having an anterior vibratile and a posterior 

 trailing flagella. In its Heliozoan state the pseudopodal 

 rays equal from two to three diamaters of the zooid and 



decussate. 



Errata; Wherever the woid "Veiitiuni" appeais read "Ventral 

 Surface." 



In family Anisomidie, Species Diplomastix rostrum, read "rostratus" for 

 rostrum. 



lu family Anisomida>, Specie Entosiphon emarginata. reverse the ligure, 

 making the right hand border the left hand. Contractile Vesicle following 

 the change; the figure should be turned over. In the diagonosis of this 

 Species wliere the word riglit or dextral appeais read "left" or ' Sinistral." 



*Appendix to vol. II Kent's Manual of the Infusoria. 



