FRESHWATER RHIZOPODS AND HELIOZOA. B55) 
General and abundant in still waters. 
From Llyn Teyrn, N. Wales, several forms were noticed of a 
deep reddish-brown colour and which possessed rather fewer 
pseudopodia. It is quite possible they belonged to some other 
species of Rhizopod, but they were associated with normal forms 
of A. Sol. Diameter 26-27 p. 
Forma picra.—Aetinophrys picta, Leidy, 1. ¢. 1879, p. 241, 
t. xlvi. f. 4. 
Near Brigg, Lincolnshire. Variable in size, the smallest forms 
having a diameter of only 3ly. Leidy’s species A. picta seems 
to me to be merely a form of A. Sol containing a considerabie 
amount of more or less diffused chlorophyll granules. The 
general structure of the body, especially in the foamy appear- 
ance of the protoplasm and the nature of the pseudopodia, is in 
both cases identical. 
57. ACTINOPHRYS SUBALPINA, sp. n. (PI. 30. fig. 36.) 
Body subspherical, colourless, consisting of semitransparent, 
finely granulated protoplasm from which foamy vesicles are 
entirely absent. Nucleus single, large, finely granulated, gene- 
rally prominent. Contractile vacuole single, prominently situated 
at one edge. Pseudopodia very long, straight, rigid, with a 
delicate central axis, twice or three times longer than the diameter 
of the body, very robust and gradually attenuated to a fine apex ; 
containing numerous granules, but with perfectly smooth edges. 
Diameter of body 42-61 »; length of pseudopodia 60-125 p. 
Associated with Pamphagus curvus amongst wet moss on 
dripping rocks, Snowdon, N. Wales, at 3000 ft. elevation. 
This fine Heliozoén appears to be quite distinct from any form 
of Actinophrys Sol I have yet come across. The body, which is 
relatively small, has a totally different structure from that of 
A. Sol, tlie finely granular protoplasm being absolutely devoid 
of the foim-like vesicles which are characteristic of the latter 
species. The pseudopodia are also of a diflerent type, being 
relatively lounger and stouter, and distinctly though gradually 
attenuated to a very fine point; they possess smooth edges, but 
contain numerous scattered groups of minute granules. Runuing 
up the middle of each pseudopodium is a delicate thread-like axis 
which can frequently be traced down into the body of the animal.’ 
The nucleus, which in A. Sol is usually difficult of observation, is 
