MASTIGAMOEBA EAMULOSA. 73 



2. Mastigamceba ramulosa Kent. 

 (Plate VI, fig. (5.) 



Mastigamteba ramulosa KENT Man. Infus. I, pt. 2 (1880), 

 p. 222, t. i, ff. 19, 20. 



Body during active movement elongate-ovate, about 

 one and a half times longer than broad, the entire 

 peripheral surface bearing sub-equal branched pseudo- 

 podal prolongations. Neither these nor the general 

 surface of the body show secondary hispid pseudo- 

 podia, The flagellum exceeds the body in length. 

 The nucleus is sub-central and spherical ; the con- 

 tractile vesicle is located posteriorly. 



Dimensions : Length (according to Saville Kent) 

 1-400" (63 p.). 



In marsh -water, as yet only met with in Jersey 

 (Kent). 



The description of this organism is from Kent's 

 ' Manual of the Infusoria.' The author says that the 

 conspicuously - branched character of the abundant 

 pseudopodia serves to distinguish it readily from other 

 forms, and communicates to it, as a whole, an aspect 

 suggestive of a minute Nudibranch. Under any dis- 

 turbing influence the little animal immediately con- 

 tracts into a sub-spheroidal contour. It was observed 

 that the granule-circulation, conspicuously indicated in 

 the centre substance of the body, did not extend into 

 the branched pseudopodia, nor were these appendages 

 withdrawn entirely within the periphery at any time. 



Genus 4. PELOMYXA Greeff, 1874. 



Pelobius* GREEFF in Verb. nat. Ver. Rheinl. XXVII (1870), 



pp. 198, 200. 

 Pdomyxa GKEEFF in Arch. f. inikr. Anat. X (1874), p. 51. 



Amoeboid rhizopods mostly of large size with a 

 hyaline ectoplasm and granular semi-fluid endoplasm, 



* Pre-occupied in Coleoptera. 



