220 ME. J. CASH OlS" NEW AND LITTLE-KNOWlSr 



green, together with refringent yellowish or brownish, oil-like 

 globules. Nucleus pale, situated in the anterior region ; contrac- 

 tile vesicles one or more. 



The posterior extremity is produced into a delicately fringed 

 expansion of faintly granular ectoplasm, in which are usually one 

 or two clear vacuoles, the external outline being irregular and 

 occasionally lobate. Including this posterior expansion, the 

 entire body of the animal is closely beset with rigid hair-like 

 processes, or spicula, radiating outwards, and resembling those 

 which clothe the membranous test of Cochliopodium vestihim. 

 This latter character distinguishes A. pilosa from all other forms 

 of Amoeba. Locomotion is effected by lobular expansions of the 

 ectoplasm, anterior or lateral. As in A. proteus or A. villosa, 

 the pseudopodia may originate at any point on the body-surface, 

 but have never been observed to become digitate. 



Dimensions : length about 180 fi ; average breadth 50 //,. 



In ponds at Chelford, Cheshire, amongst the matted foliage 

 of Utricularia and a species of water Hanunculus ; also at Fearn- 

 head, Lancashire, in similar situations, 1903. 



It is difficult to explain, either the origin of the spicula which 

 invest the body of this Amoeia, or their mode of attachment to 

 the soft protoplasmic surface over which they are very evenly, 

 and at the same time thickly, distributed. Immediately a 

 pseudopodal lobe is formed, the cil-like processes flow over it 

 from the surrounding surface. 



This organism was usually found associated with Mastigammha 

 aspera, E. Schulze. The Fearnhead examples presented some 

 diff'erences of habit, though agreeing in the pilose character. 

 They were probably older individuals. The spicula were usually 

 stouter and darker in colour ; the endoplasm was denser ; the 

 posterior appendage was absent, and the animal was more 

 sluggish in its movements. 



Grenus Mastigamceba, Eil. Schulze. 



Mastigamceba aspera, E. Schulze, Archiv fiir mikr. Anat. 

 Bd. xi. p. 583, t. XXXV. ff. 1-3. (PI. 26. figs. 3, 4.) 



In various localities in Cheshire and Lancashire; Chelford,. 

 Northen Etchells, Eearnhead, 1903. 



Dimensions: length, when fully grown, 150-250 /x; greatest 

 breadth 100 ^. 



The facial aspect of Mastigamceba aspera is totally different 



